include all prerequisites in header files

Originally committed as revision 9344 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/rtjpeg.h

@@ -22,6 +22,9 @@
 #ifndef RTJPEG_H
 #define RTJPEG_H
 
+#include <stdint.h>
+#include <dsputil.h>
+
 typedef struct {
     int w, h;
     DSPContext *dsp;