Add missing #includes for avutil.h, required for the AV_VERSION* macros.

Originally committed as revision 20544 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavdevice/avdevice.h

@@ -19,6 +19,8 @@
 #ifndef AVDEVICE_AVDEVICE_H
 #define AVDEVICE_AVDEVICE_H
 
+#include "libavutil/avutil.h"
+
 #define LIBAVDEVICE_VERSION_MAJOR 52
 #define LIBAVDEVICE_VERSION_MINOR  2
 #define LIBAVDEVICE_VERSION_MICRO  0

libavfilter/avfilter.h

@@ -22,6 +22,8 @@
 #ifndef AVFILTER_AVFILTER_H
 #define AVFILTER_AVFILTER_H
 
+#include "libavutil/avutil.h"
+
 #define LIBAVFILTER_VERSION_MAJOR  1
 #define LIBAVFILTER_VERSION_MINOR  8
 #define LIBAVFILTER_VERSION_MICRO  0