* qatar/master:
  png: add missing #if HAVE_SSSE3 around function pointer assignment.
  imdct36: mark SSE functions as using all 16 XMM registers.
  png: move DSP functions to their own DSP context.
  sunrast: Add a sample request for TIFF, IFF, and Experimental Rastfile formats.
  sunrast: Cosmetics
  sunrast: Remove if (unsigned int < 0) check.
  sunrast: Replace magic number by a macro.

Conflicts:
	libavcodec/dsputil.c
	libavcodec/dsputil.h
	libavcodec/pngdec.c
	libavcodec/sunrast.c
	libavcodec/x86/Makefile
	libavcodec/x86/dsputil_mmx.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>