avcodec/utils: Clear MMX state before returning from avcodec_default_execute*()

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 4f96f9d111)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/utils.c

@@ -1116,6 +1116,7 @@ int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, v
         if (ret)
             ret[i] = r;
     }
+    emms_c();
     return 0;
 }
 
@@ -1128,6 +1129,7 @@ int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2,
         if (ret)
             ret[i] = r;
     }
+    emms_c();
     return 0;
 }