dont trash mm0, its still used in the next iteration of the loop (fixes...

dont trash mm0, its still used in the next iteration of the loop (fixes strange horizontal lines on some blocks in b frames on mmx only cpus)


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@855 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/i386/dsputil_mmx_rnd.h

@@ -214,10 +214,10 @@ static void DEF(avg, pixels_y2)(UINT8 *block, const UINT8 *pixels, int line_size
 	"movq	(%1, %%eax), %%mm0	\n\t"
 	PAVGBP(%%mm1, %%mm2, %%mm4,   %%mm0, %%mm1, %%mm5)
 	"movq	(%2), %%mm3		\n\t"
-	PAVGB(%%mm3, %%mm4, %%mm0, %%mm6)
+	PAVGB(%%mm3, %%mm4, %%mm2, %%mm6)
 	"movq	(%2, %3), %%mm3		\n\t"
 	PAVGB(%%mm3, %%mm5, %%mm1, %%mm6)
-	"movq	%%mm0, (%2)		\n\t"
+	"movq	%%mm2, (%2)		\n\t"
 	"movq	%%mm1, (%2, %3)		\n\t"
 	"addl	%%eax, %1		\n\t"
 	"addl	%%eax, %2		\n\t"