avcodec/zmbv: decoder supports init_cleanup capability

libavcodec/zmbv.c

@@ -647,4 +647,5 @@ AVCodec ff_zmbv_decoder = {
     .close          = decode_end,
     .decode         = decode_frame,
     .capabilities   = AV_CODEC_CAP_DR1,
+    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
 };