Merge branch 'abstract-io'

diff --cc taglib/CMakeLists.txt
Simple merge

diff --cc taglib/flac/flacfile.cpp
Simple merge

diff --cc taglib/toolkit/tfile.cpp
index 93879f10cdfba20efd4afc65feab8a1d2a9f2f6e,c0afd4031bc41923e562d72fd7216c2f35aa6068..bb0261eae3a6df461a73a4d62414ae1090b803af
--- 1/taglib/toolkit/tfile.cpp
--- 2/taglib/toolkit/tfile.cpp
+++ b/taglib/toolkit/tfile.cpp
@@@ -550,18 -314,12 +314,13 @@@ bool File::isWritable(const char *file
  // protected members
  ////////////////////////////////////////////////////////////////////////////////
  
- void File::setValid(bool valid)
- {
-   d->valid = valid;
- }
- 
- void File::truncate(long length)
+ TagLib::uint File::bufferSize()
  {
-   ftruncate(fileno(d->file), length);
+   return FilePrivate::bufferSize;
  }
  
- TagLib::uint File::bufferSize()
+ void File::setValid(bool valid)
  {
-   return FilePrivate::bufferSize;
+   d->valid = valid;
  }
 +