avformat/internal: Fix warning about struct declaration

Moving ffio_open2_wrapper() to internal as it uses AVFormatContext
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/avio_internal.h

@@ -157,7 +157,4 @@ int ffio_close_null_buf(AVIOContext *s);
  */
 void ffio_free_dyn_buf(AVIOContext **s);
 
-int ffio_open2_wrapper(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags,
-                       const AVIOInterruptCB *int_cb, AVDictionary **options);
-
 #endif /* AVFORMAT_AVIO_INTERNAL_H */

libavformat/internal.h

@@ -487,4 +487,7 @@ enum AVWriteUncodedFrameFlags {
  */
 int ff_copy_whitelists(AVFormatContext *dst, AVFormatContext *src);
 
+int ffio_open2_wrapper(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags,
+                       const AVIOInterruptCB *int_cb, AVDictionary **options);
+
 #endif /* AVFORMAT_INTERNAL_H */