ijksdl: setup width/height in managed_frame

ijkmedia/ijksdl/ffmpeg/ijksdl_vout_overlay_ffmpeg.c

@@ -76,6 +76,9 @@ static AVFrame *opaque_setup_frame(SDL_VoutOverlay_Opaque* opaque, enum AVPixelF
     avcodec_get_frame_defaults(managed_frame);
     avcodec_get_frame_defaults(linked_frame);
     AVPicture *pic = (AVPicture *) managed_frame;
+    managed_frame->format = format;
+    managed_frame->width  = width;
+    managed_frame->height = height;
     avpicture_fill(pic, NULL, format, width, height);
     opaque->managed_frame = managed_frame;
     opaque->linked_frame  = linked_frame;