lavfi: deprecate AVFilterGraph->resample_lavr_opts

Not used by anything at all since we don't auto insert lavr filters.

Reviewed-by: wm4 <nfxjfg@googlemail.com>
Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>

libavfilter/avfiltergraph.c

@@ -128,7 +128,9 @@ void avfilter_graph_free(AVFilterGraph **graph)
 
     av_freep(&(*graph)->scale_sws_opts);
     av_freep(&(*graph)->aresample_swr_opts);
+#if FF_API_LAVR_OPTS
     av_freep(&(*graph)->resample_lavr_opts);
+#endif
     av_freep(&(*graph)->filters);
     av_freep(&(*graph)->internal);
     av_freep(graph);