[gegl] GeglNode: Stop listening to signals from proxy nodes after destruction

[Debarshi Ray <debarshir src gnome org>]

commit 8515991978c6da714815f0022fa6d2a57d7a4994
Author: Debarshi Ray <debarshir gnome org>
Date:   Wed Dec 30 10:49:11 2015 +0100

    GeglNode: Stop listening to signals from proxy nodes after destruction
    
    https://bugzilla.gnome.org/show_bug.cgi?id=759995

 gegl/graph/gegl-node.c |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)
---
diff --git a/gegl/graph/gegl-node.c b/gegl/graph/gegl-node.c
index a7c2c94..bf76c02 100644
--- a/gegl/graph/gegl-node.c
+++ b/gegl/graph/gegl-node.c
@@ -2109,10 +2109,12 @@ gegl_node_get_pad_proxy (GeglNode    *node,
 
       if (!is_graph_input)
         {
-          g_signal_connect_swapped (G_OBJECT (nop), "computed",
-                                    G_CALLBACK (gegl_node_emit_computed), node);
-          g_signal_connect (G_OBJECT (nop), "invalidated",
-                            G_CALLBACK (graph_source_invalidated), node);
+          g_signal_connect_object (G_OBJECT (nop), "computed",
+                                   G_CALLBACK (gegl_node_emit_computed), node,
+                                   G_CONNECT_SWAPPED);
+          g_signal_connect_object (G_OBJECT (nop), "invalidated",
+                                   G_CALLBACK (graph_source_invalidated), node,
+                                   0);
         }
       return nop;
     }