Issue #19276: Fixed the wave module on 64-bit big-endian platforms.

diff --cc Lib/wave.py
index 1c6380eee6538ec43340424b2ec5d0bf9b9919e6,a1daead8abde041ce9f15c245c541c1814ec287c..0e6628b087a13687781e88ad2f9f4b5ff1f485d6
--- 1/Lib/wave.py
--- 2/Lib/wave.py
+++ b/Lib/wave.py
@@@ -80,15 -80,16 +80,15 @@@ class Error(Exception)
  
  WAVE_FORMAT_PCM = 0x0001
  
- _array_fmts = None, 'b', 'h', None, 'l'
+ _array_fmts = None, 'b', 'h', None, 'i'
  
 -# Determine endian-ness
  import struct
 -if struct.pack("h", 1) == b"\000\001":
 -    big_endian = 1
 -else:
 -    big_endian = 0
 -
 +import sys
  from chunk import Chunk
 +from collections import namedtuple
 +
 +_wave_params = namedtuple('_wave_params',
 +                     'nchannels sampwidth framerate nframes comptype compname')
  
  class Wave_read:
      """Variables used in this class:
@@@ -430,9 -419,10 +431,10 @@@ class Wave_write
          nframes = len(data) // (self._sampwidth * self._nchannels)
          if self._convert:
              data = self._convert(data)
 -        if self._sampwidth > 1 and big_endian:
 +        if self._sampwidth > 1 and sys.byteorder == 'big':
              import array
              data = array.array(_array_fmts[self._sampwidth], data)
+             assert data.itemsize == self._sampwidth
              data.byteswap()
              data.tofile(self._file)
              self._datawritten = self._datawritten + len(data) * self._sampwidth

diff --cc Misc/NEWS
index 2a8bfd185d76e8ce5289e6dd10812821359df2c7,ebc7d4c4bfcbf2d5910b77371006a5170283a91b..b20fc70561b8c2eb4762a9aa41326b0df7054170
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -10,51 -12,71 +10,53 @@@ Projected release date: 2013-10-2
  Core and Builtins
  -----------------
  
 -- Fix macro expansion of _PyErr_OCCURRED(), and make sure to use it in at
 -  least one place so as to avoid regressions.
 -
 -- Issue #19014: memoryview.cast() is now allowed on zero-length views.
 -
 -- Issue #19098: Prevent overflow in the compiler when the recursion limit is set
 -  absurdly high.
 -
 -- Issue #18942: sys._debugmallocstats() output was damaged on Windows.
 -
 -- Issue #18667: Add missing "HAVE_FCHOWNAT" symbol to posix._have_functions.
 -
 -- Issue #18368: PyOS_StdioReadline() no longer leaks memory when realloc()
 -  fails.
 -
 -- Issue #16741: Fix an error reporting in int().
 -
 -- Issue #17899: Fix rare file descriptor leak in os.listdir().
 -
 -- Issue #18552: Check return value of PyArena_AddPyObject() in
 -  obj2ast_object().
 -
 -- Issue #18560: Fix potential NULL pointer dereference in sum().
 +- Issue #4555: All exported C symbols are now prefixed with either
 +  "Py" or "_Py".
  
 -- Issue #15905: Fix theoretical buffer overflow in handling of sys.argv[0],
 -  prefix and exec_prefix if the operation system does not obey MAXPATHLEN.
 +- Issue #19219: Speed up marshal.loads(), and make pyc files slightly
 +  (5% to 10%) smaller.
  
 -- Issue #18344: Fix potential ref-leaks in _bufferedreader_read_all().
 +- Issue #19221: Upgrade Unicode database to version 6.3.0.
  
 -- Issue #17872: Fix a segfault in marshal.load() when input stream returns
 -  more bytes than requested.
 +- Issue #16742: The result of the C callback PyOS_ReadlineFunctionPointer must
 +  now be a string allocated by PyMem_RawMalloc() or PyMem_RawRealloc() (or NULL
 +  if an error occurred), instead of a string allocated by PyMem_Malloc() or
 +  PyMem_Realloc().
  
 -- Issue #18426: Fix NULL pointer dereference in C extension import when
 -  PyModule_GetDef() returns an error.
 +- Issue #19199: Remove ``PyThreadState.tick_counter`` field
  
 -- Issue #18328: Reorder ops in PyThreadState_Delete*() functions. Now the
 -  tstate is first removed from TLS and then deallocated.
 +- Fix macro expansion of _PyErr_OCCURRED(), and make sure to use it in at
 +  least one place so as to avoid regressions.
  
 -- Issue #18184: PyUnicode_FromFormat() and PyUnicode_FromFormatV() now raise
 -  OverflowError when an argument of %c format is out of range.
 +- Issue #19087: Improve bytearray allocation in order to allow cheap popping
 +  of data at the front (slice deletion).
  
 -- Issue #18137: Detect integer overflow on precision in float.__format__()
 -  and complex.__format__().
 +- Issue #19014: memoryview.cast() is now allowed on zero-length views.
  
 -- Issue #18183: Fix various unicode operations on strings with large unicode
 -  codepoints.
 +- Issue #18690: memoryview is now automatically registered with
 +  collections.abc.Sequence
  
 -- Issue #18180: Fix ref leak in _PyImport_GetDynLoadWindows().
 +- Issue #19078: memoryview now correctly supports the reversed builtin
 +  (Patch by Claudiu Popa)
  
 -- Issue #18038: SyntaxError raised during compilation sources with illegal
 -  encoding now always contains an encoding name.
 +Library
 +-------
  
 -- Issue #17644: Fix a crash in str.format when curly braces are used in square
 -  brackets.
++- Issue #19276: Fixed the wave module on 64-bit big-endian platforms.
+ 
 -- Issue #17983: Raise a SyntaxError for a ``global __class__`` statement in a
 -  class body.
 +- Issue #19266: Rename the new-in-3.4 ``contextlib.ignore`` context manager
 +  to ``contextlib.suppress`` in order to be more consistent with existing
 +  descriptions of that operation elsewhere in the language and standard
 +  library documentation (Patch by Zero Piraeus)
  
 -- Issue #17927: Frame objects kept arguments alive if they had been copied into
 -  a cell, even if the cell was cleared.
 +- Issue #18891: Completed the new email package (provisional) API additions
 +  by adding new classes EmailMessage, MIMEPart, and ContentManager.
  
 -Library
 --------
 +- Issue #18468: The re.split, re.findall, and re.sub functions and the group()
 +  and groups() methods of match object now always return a string or a bytes
 +  object.
  
 -- Issue #19276: Fixed the wave module on 64-bit big-endian platforms.
 +- Issue #18725: The textwrap module now supports truncating multiline text.
  
  - Issue #18776: atexit callbacks now display their full traceback when they
    raise an exception.