pthreads: export the delay that was previously exported by mangling has_b_frames through

AVCodecContext.delay which was previously unused for decoders and fits better.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/pthread.c

@@ -363,6 +363,7 @@ static int update_context_from_thread(AVCodecContext *dst, AVCodecContext *src,
     }
 
     if (for_user) {
+        dst->delay         = src->thread_count - 1;
         dst->coded_frame   = src->coded_frame;
     } else {
         if (dst->codec->update_thread_context)

libavcodec/version.h

@@ -21,7 +21,7 @@
 #define AVCODEC_VERSION_H
 
 #define LIBAVCODEC_VERSION_MAJOR 53
-#define LIBAVCODEC_VERSION_MINOR 30
+#define LIBAVCODEC_VERSION_MINOR 31
 #define LIBAVCODEC_VERSION_MICRO  0
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \