Use put_signed_pixels_clamped where appropriate
Use put_signed_pixels_clamped where appropriate

Patch by Christophe GISQUET christophe.gisquet <whirlpool sign> fr(run of two 'e').(copy 2 bytes with offset -5)
Thread: [PATCH] Use signed version when putting and clamping pixels in VC-1


git-svn-id: a4d7c1866f8397a4106e0b57fc4fbf792bbdaaaf@11029 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

prajnashi/ffmpeg,prajnashi/ffmpeg,prajnashi/ffmpeg,prajnashi/ffmpeg