Merge branch 'PHP-5.5'

* PHP-5.5:
  NEWS
  fix build with bundled libgd
  Move png and jpeg version functions to gd.c so the external library build doesn't include anything from libgd/.
  Remove extra unused functions from gd_compat.h
  Rewrite Xpm library check so it doesn't break on MultiArch systems
  Required GD >= 2.1.0 or GD bundled, this allows us to remove most of the #ifdef
  * Remove overflow2, getmbi and skipheaders from gd_compat.h * Add missing return in _php_ctx_getmbi * Reintroduce imagecreatefromxbm by checking for gdCreateImageFromXbm
  Remove overflow2, getmbi and skipheader, since they are not needed anymore.
  Allow to use new GD-2.1.0 function from system library

diff --cc ext/gd/gd.c
index 802b3d3a2526c8a49652056af96b8b0dcd69bf3e,9b326305bc20232f3444eeb312df91f5a160ccbe..c39ffdfe1af09c73153aa7af2c4711b38c9c16bc
--- 1/ext/gd/gd.c
--- 2/ext/gd/gd.c
+++ b/ext/gd/gd.c
@@@ -97,43 -131,8 +135,12 @@@ static void php_free_ps_enc(zend_rsrc_l
  static void php_imagettftext_common(INTERNAL_FUNCTION_PARAMETERS, int, int);
  #endif
  
- #if HAVE_LIBGD15
- /* it's >= 1.5, i.e. has IOCtx */
- #define USE_GD_IOCTX 1
- #else
- #undef USE_GD_IOCTX
- #endif
- 
- #ifdef USE_GD_IOCTX
  #include "gd_ctx.c"
- #else
- #define gdImageCreateFromGdCtx      NULL
- #define gdImageCreateFromGd2Ctx     NULL
- #define gdImageCreateFromGd2partCtx NULL
- #define gdImageCreateFromGifCtx     NULL
- #define gdImageCreateFromJpegCtx    NULL
- #define gdImageCreateFromPngCtx     NULL
- #define gdImageCreateFromWBMPCtx    NULL
- typedef FILE gdIOCtx;
- #define CTX_PUTC(c, fp) fputc(c, fp)
- #endif
- 
- #ifndef HAVE_GDIMAGECOLORRESOLVE
- extern int gdImageColorResolve(gdImagePtr, int, int, int);
- #endif
- 
- #if HAVE_COLORCLOSESTHWB
- int gdImageColorClosestHWB(gdImagePtr im, int r, int g, int b);
- #endif
- 
- #ifndef HAVE_GD_DYNAMIC_CTX_EX
- #define gdNewDynamicCtxEx(len, data, val) gdNewDynamicCtx(len, data)
- #endif
  
 +/* as it is not really public, duplicate declaration here to avoid 
 +   pointless warnings */
 +int overflow2(int a, int b);
 +
  /* Section Filters Declarations */
  /* IMPORTANT NOTE FOR NEW FILTER
   * Do not forget to update: