pthread: copy coded frame dimensions in update_context_from_thread

Signed-off-by: Janne Grunau <janne-libav@jannau.net>

libavcodec/pthread.c

@@ -332,6 +332,9 @@ static int update_context_from_thread(AVCodecContext *dst, AVCodecContext *src,
         dst->height    = src->height;
         dst->pix_fmt   = src->pix_fmt;
 
+        dst->coded_width  = src->coded_width;
+        dst->coded_height = src->coded_height;
+
         dst->has_b_frames = src->has_b_frames;
         dst->idct_algo    = src->idct_algo;
         dst->slice_count  = src->slice_count;