Merge commit '452e343295e25f7b2cbc8529c66e9386e2ea6f55' into release/0.10

* commit '452e343295e25f7b2cbc8529c66e9386e2ea6f55':
  avcodec: Add more missing #includes for ff_get_buffer()

Merged-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/libgsm.c

@@ -30,6 +30,7 @@
 #include <gsm/gsm.h>
 
 #include "avcodec.h"
+#include "internal.h"
 #include "gsm.h"
 
 static av_cold int libgsm_encode_init(AVCodecContext *avctx) {

libavcodec/libopencore-amr.c

@@ -20,6 +20,7 @@
  */
 
 #include "avcodec.h"
+#include "internal.h"
 #include "libavutil/avstring.h"
 #include "libavutil/opt.h"