Add FFMPEG_ prefix to all multiple inclusion guards.

Originally committed as revision 10765 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/mpcdata.h

@@ -19,8 +19,8 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#ifndef AVCODEC_MPCDATA_H
-#define AVCODEC_MPCDATA_H
+#ifndef FFMPEG_MPCDATA_H
+#define FFMPEG_MPCDATA_H
 
 #include <stdint.h>
 
@@ -209,4 +209,4 @@ static const float mpc7_SCF[128] = {
     0.000000044293003043, 0.000000036895215771, 0.000000030733001921, 0.000000025599996789
 };
 
-#endif // AVCODEC_MPCDATA_H
+#endif /* FFMPEG_MPCDATA_H */