[gimp] app: don't leak all warp strokes, unref them in button_release()

[Michael Natterer <mitch src gnome org>]

commit 3eadcd5e9ee50647186f5397bebc1a05f007d4bf
Author: Michael Natterer <mitch gimp org>
Date:   Wed May 22 09:01:54 2013 +0200

    app: don't leak all warp strokes, unref them in button_release()

 app/tools/gimpwarptool.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/app/tools/gimpwarptool.c b/app/tools/gimpwarptool.c
index b9da248..bc73526 100644
--- a/app/tools/gimpwarptool.c
+++ b/app/tools/gimpwarptool.c
@@ -228,6 +228,9 @@ gimp_warp_tool_button_release (GimpTool              *tool,
   g_printerr ("%s\n", gegl_path_to_string (wt->current_stroke));
 #endif
 
+  g_object_unref (wt->current_stroke);
+  wt->current_stroke = NULL;
+
   if (release_type == GIMP_BUTTON_RELEASE_CANCEL)
     {
       gimp_warp_tool_undo (wt);