[gimp] app: Ensure the graph for fs filters is always constructed when needed.

[Michael Henning <mhenning src gnome org>]

commit e7b749d55dd3a07e45b2a3054a6a418feee37731
Author: Michael Henning <drawoc darkrefraction com>
Date:   Sat Aug 10 12:34:42 2013 -0400

    app: Ensure the graph for fs filters is always constructed when needed.

 app/core/gimpdrawable.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/app/core/gimpdrawable.c b/app/core/gimpdrawable.c
index 11bf697..ef55cc3 100644
--- a/app/core/gimpdrawable.c
+++ b/app/core/gimpdrawable.c
@@ -1762,5 +1762,12 @@ gimp_drawable_get_floating_sel_filter (GimpDrawable *drawable)
   g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
   g_return_val_if_fail (gimp_drawable_get_floating_sel (drawable) != NULL, NULL);
 
+  /*
+   * Ensure that the graph is construced before the filter is used.
+   * Otherwise, we rely on the projection to cause the graph to be constructed,
+   * which fails for images that aren't displayed.
+   */
+  gimp_filter_get_node (GIMP_FILTER (drawable));
+
   return drawable->private->fs_filter;
 }