removed debug function

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@519 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/i386/dsputil_mmx.c

@@ -1080,7 +1080,9 @@ static void clear_blocks_mmx(DCTELEM *blocks)
         );
 }
 
+#if 0
 static void just_return() { return; }
+#endif
 
 void dsputil_init_mmx(void)
 {