include required header

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@12307 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/imgconvert.h

@@ -24,6 +24,8 @@
 #ifndef FFMPEG_IMGCONVERT_H
 #define FFMPEG_IMGCONVERT_H
 
+#include "avcodec.h"
+
 int ff_fill_linesize(AVPicture *picture, int pix_fmt, int width);
 
 int ff_fill_pointer(AVPicture *picture, uint8_t *ptr, int pix_fmt, int height);