[gimp] app: don't keep images from the clipboard in gimp->images

[Michael Natterer <mitch src gnome org>]

commit 0740d8d688972e241113a8d9e3ce27d8a2bf1cbe
Author: Michael Natterer <mitch gimp org>
Date:   Sun Sep 18 21:56:47 2016 +0200

    app: don't keep images from the clipboard in gimp->images
    
    They are temporary internal objects. In gimp->images they would
    be visible in the GUI and PDB.

 app/widgets/gimpselectiondata.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)
---
diff --git a/app/widgets/gimpselectiondata.c b/app/widgets/gimpselectiondata.c
index 8ac8a48..597cd87 100644
--- a/app/widgets/gimpselectiondata.c
+++ b/app/widgets/gimpselectiondata.c
@@ -377,7 +377,12 @@ gimp_selection_data_get_xcf (GtkSelectionData *selection,
 
   image = xcf_load_stream (gimp, input, NULL, NULL, &error);
 
-  if (! image)
+  if (image)
+    {
+      /*  don't keep clipboard images in the image list  */
+      gimp_container_remove (gimp->images, GIMP_OBJECT (image));
+    }
+  else
     {
       g_warning ("Recieved invalid XCF data: %s", error->message);
       g_clear_error (&error);