Fixes GCC4 fix by using "g" instead of "mp" as some compilers misscompile

that code othewisei (leading to segfaults).

Originally committed as revision 15814 to svn://svn.mplayerhq.hu/mplayer/trunk/postproc

postproc/swscale_template.c

@@ -2547,7 +2547,7 @@ FUNNY_UV_CODE
 		"cmp %2, %%"REG_a"		\n\t"
 		" jb 1b				\n\t"
 
-		:: "m" (src1), "m" (dst), "mp" ((long)dstWidth), "m" (xInc_shr16), "m" (xInc_mask),
+		:: "m" (src1), "m" (dst), "g" ((long)dstWidth), "m" (xInc_shr16), "m" (xInc_mask),
 		"r" (src2)
 		: "%"REG_a, "%"REG_b, "%ecx", "%"REG_D, "%esi"
 		);