[gimp] Bug 788442 - Gimp crashes not using GEGL Operation tool.

[Jehan Pagès <jehanp src gnome org>]

commit 12df7960ad461d3c4e6fe7fab01ce2db7eacd150
Author: Jehan <jehan girinstud io>
Date:   Wed Oct 4 23:25:08 2017 +0200

    Bug 788442 - Gimp crashes not using GEGL Operation tool.
    
    Properly set the pointer as a weak pointer, same as in GimpOperationTool
    parent class, to make sure it is resetted to NULL upon destruction.

 app/tools/gimpgegltool.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/app/tools/gimpgegltool.c b/app/tools/gimpgegltool.c
index f79ec41..747767c 100644
--- a/app/tools/gimpgegltool.c
+++ b/app/tools/gimpgegltool.c
@@ -476,6 +476,8 @@ gimp_gegl_tool_dialog (GimpFilterTool *filter_tool)
   /*  The options vbox  */
   o_tool->options_gui =
     gtk_label_new (_("Select an operation from the list above"));
+  g_object_add_weak_pointer (G_OBJECT (o_tool->options_gui),
+                             (gpointer) &o_tool->options_gui);
   gimp_label_set_attributes (GTK_LABEL (o_tool->options_gui),
                              PANGO_ATTR_STYLE, PANGO_STYLE_ITALIC,
                              -1);