[gnome-photos] organize-collection-view: Don't leak the newly created URN

[Debarshi Ray <debarshir src gnome org>]

commit b747a6108e36aa22ea8efdaefef7d4860d9652ad
Author: Debarshi Ray <debarshir gnome org>
Date:   Tue Feb 6 22:36:25 2018 +0100

    organize-collection-view: Don't leak the newly created URN
    
    Fallout from 23919376f98ee6aba56af7aafd3639913a13b590

 src/photos-organize-collection-view.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/src/photos-organize-collection-view.c b/src/photos-organize-collection-view.c
index b153fc3d..cc6eb3aa 100644
--- a/src/photos-organize-collection-view.c
+++ b/src/photos-organize-collection-view.c
@@ -119,7 +119,7 @@ photos_organize_collection_view_create_collection_executed (GObject *source_obje
   GError *error;
   GtkTreeIter iter;
   GtkTreePath *path = NULL;
-  const gchar *created_urn;
+  gchar *created_urn = NULL;
 
   error = NULL;
   created_urn = photos_create_collection_job_finish (col_job, res, &error);
@@ -157,6 +157,7 @@ photos_organize_collection_view_create_collection_executed (GObject *source_obje
 
  out:
   g_clear_object (&set_job);
+  g_free (created_urn);
   gtk_tree_path_free (path);
 }