Add forgotton multiple inclusion guards to h264_mvpred.h.

Originally committed as revision 21220 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/h264_mvpred.h

@@ -25,6 +25,9 @@
  * @author Michael Niedermayer <michaelni@gmx.at>
  */
 
+#ifndef AVCODEC_H264_MVPRED_H
+#define AVCODEC_H264_MVPRED_H
+
 #include "internal.h"
 #include "avcodec.h"
 #include "h264.h"
@@ -235,3 +238,5 @@ static inline void pred_pskip_motion(H264Context * const h, int * const mx, int
 
     return;
 }
+
+#endif /* AVCODEC_H264_MVPRED_H */