Use emms_c() instead of ifdef

                                                                                
patch by: Ronald S. Bultje rsbultje a gmail d com                               



git-svn-id: file:///var/local/repositories/ffmpeg/trunk@10616 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/imgconvert.c

@@ -2855,9 +2855,7 @@ int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
                                         width, height);
         }
     }
-#ifdef HAVE_MMX
-    emms();
-#endif
+    emms_c();
     return 0;
 }