[gnome-network-displays/benzea/fix-p2p-sink-removal: 2/3] meta-sink: Fix critical warning when there is no sink

[Benjamin Berg <bberg src gnome org>]

commit e0af7958ff542b8b20f4d2c0d5b6a1ddc77144f6
Author: Benjamin Berg <bberg redhat com>
Date:   Tue Oct 13 17:31:42 2020 +0200

    meta-sink: Fix critical warning when there is no sink
    
    A meta sink can be empty (i.e. have no child sinks). In this case, the
    finalize handler cannot disconnect anymore. Just add the appropriate
    guard.

 src/nd-meta-sink.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/src/nd-meta-sink.c b/src/nd-meta-sink.c
index d5ed075..45f3368 100644
--- a/src/nd-meta-sink.c
+++ b/src/nd-meta-sink.c
@@ -223,7 +223,8 @@ nd_meta_sink_finalize (GObject *object)
   g_ptr_array_free (meta_sink->sinks, TRUE);
   meta_sink->sinks = NULL;
 
-  g_signal_handlers_disconnect_by_data (meta_sink->current_sink, meta_sink);
+  if (meta_sink->current_sink)
+    g_signal_handlers_disconnect_by_data (meta_sink->current_sink, meta_sink);
   g_clear_object (&meta_sink->current_sink);
 
   G_OBJECT_CLASS (nd_meta_sink_parent_class)->finalize (object);