Merge commit '581281e242609a222233a2e5538b89dfb88fb18e'

Merge commit '581281e242609a222233a2e5538b89dfb88fb18e'

* commit '581281e242609a222233a2e5538b89dfb88fb18e':
  matroskadec: check realloc in lzo encoding
  matroska: honor error_recognition on unknown doctypes
  tiffdec: Add support for GRAY16LE.
  tiffenc: Add support for little endian RGB48 and GRAY16
  mpeg4: support frame parameter changes with frame-mt
  mpegvideo: check ff_find_unused_picture() return value for errors
  mpegvideo: release frame buffers before freeing them
  configure: msvc: default to 'lib' as 'ar' tool
  build: support some non-standard ar variants

Conflicts:
	libavcodec/h263dec.c
	libavcodec/mpegvideo.c
	libavcodec/tiff.c
	libavcodec/tiffenc.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>