[gimp/soc-2011-seamless-clone2] app: make sure the projection buffer exists in gimp_projection_pickable_flush()

[Clayton Walker <claytonw src gnome org>]

commit 12839f663365a82e5b0667ece6d934b225316303
Author: Michael Natterer <mitch gimp org>
Date:   Tue Dec 18 19:30:33 2012 +0100

    app: make sure the projection buffer exists in gimp_projection_pickable_flush()
    
    This does not make any difference for normal images, but for images
    without display (like when creating thumbnails, or for GUI-less
    scripting), this is now needed because we create the initial
    projection much more lazily, and got an empty projection.

 app/core/gimpprojection.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/app/core/gimpprojection.c b/app/core/gimpprojection.c
index eb97f20..2e55392 100644
--- a/app/core/gimpprojection.c
+++ b/app/core/gimpprojection.c
@@ -229,6 +229,9 @@ gimp_projection_pickable_flush (GimpPickable *pickable)
 {
   GimpProjection *proj = GIMP_PROJECTION (pickable);
 
+  /* create the buffer if it doesn't exist */
+  gimp_projection_get_buffer (pickable);
+
   gimp_projection_finish_draw (proj);
   gimp_projection_flush_now (proj);