[mutter] screen-cast-stream-src: Don't leak GSource

[Jonas Ådahl <jadahl src gnome org>]

commit 26e1e495a05512a67a14fd23f4732670b582f3bd
Author: Jonas Ådahl <jadahl gmail com>
Date:   Thu Mar 5 23:29:26 2020 +0100

    screen-cast-stream-src: Don't leak GSource
    
    For every stream src, we created and attached a GSource. Upon stream
    src destruction, we g_source_destroy():ed the GSource. What
    g_source_destroy() does, hawever, is not really "destroy" it but only
    detaches it from the main context removing the reference the context had
    added for it via g_source_attach(). This caused the GSource to leak,
    although in a detached state, as the reference taken on creation was
    still held.
    
    Fix this by also removing our own reference to it when finalizing.
    
    https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1106

 src/backends/meta-screen-cast-stream-src.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/src/backends/meta-screen-cast-stream-src.c b/src/backends/meta-screen-cast-stream-src.c
index 170f34043..4f3d821ef 100644
--- a/src/backends/meta-screen-cast-stream-src.c
+++ b/src/backends/meta-screen-cast-stream-src.c
@@ -885,7 +885,7 @@ create_pipewire_source (void)
   pipewire_source->pipewire_loop = pw_loop_new (NULL);
   if (!pipewire_source->pipewire_loop)
     {
-      g_source_destroy ((GSource *) pipewire_source);
+      g_source_unref ((GSource *) pipewire_source);
       return NULL;
     }
 
@@ -980,6 +980,7 @@ meta_screen_cast_stream_src_finalize (GObject *object)
   g_clear_pointer (&priv->pipewire_core, pw_core_disconnect);
   g_clear_pointer (&priv->pipewire_context, pw_context_destroy);
   g_source_destroy (&priv->pipewire_source->base);
+  g_source_unref (&priv->pipewire_source->base);
 
   G_OBJECT_CLASS (meta_screen_cast_stream_src_parent_class)->finalize (object);
 }