Add missing #includes to fix 'make checkheaders'.

Originally committed as revision 17398 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/aac.h

@@ -30,6 +30,7 @@
 #ifndef AVCODEC_AAC_H
 #define AVCODEC_AAC_H
 
+#include "libavutil/internal.h"
 #include "avcodec.h"
 #include "dsputil.h"
 #include "mpeg4audio.h"

libavcodec/ac3dec.h

@@ -27,6 +27,7 @@
 #ifndef AVCODEC_AC3DEC_H
 #define AVCODEC_AC3DEC_H
 
+#include "libavutil/internal.h"
 #include "libavutil/lfg.h"
 #include "ac3.h"
 #include "bitstream.h"

libavformat/avio.h

@@ -23,6 +23,8 @@
 
 #include <stdint.h>
 
+#include "libavutil/common.h"
+
 /* unbuffered I/O */
 
 /**