[gimp] app: don't leak GimpInkOption's GtkSizeGroup

[Michael Natterer <mitch src gnome org>]

commit f39399c9fc3140824bbbdfe8dc58488ffe18be1b
Author: Michael Natterer <mitch gimp org>
Date:   Fri Nov 4 01:32:17 2011 +0100

    app: don't leak GimpInkOption's GtkSizeGroup

 app/tools/gimpinkoptions-gui.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/app/tools/gimpinkoptions-gui.c b/app/tools/gimpinkoptions-gui.c
index a175f7b..6daba3b 100644
--- a/app/tools/gimpinkoptions-gui.c
+++ b/app/tools/gimpinkoptions-gui.c
@@ -123,6 +123,7 @@ gimp_ink_options_gui (GimpToolOptions *tool_options)
   gtk_widget_show (blob_box);
 
   gtk_size_group_add_widget (size_group, blob_box);
+  g_object_unref (size_group);
 
   /* Blob editor */
   frame = gtk_aspect_frame_new (NULL, 0.0, 0.5, 1.0, FALSE);