[gimp] app: don't leak the property keys hash tables of duplicated Gegl paramspecs

[Michael Natterer <mitch src gnome org>]

commit f04ec31478561bd48555f8b97ea5f3d71f52dee2
Author: Michael Natterer <mitch gimp org>
Date:   Fri Jun 20 09:00:46 2014 +0200

    app: don't leak the property keys hash tables of duplicated Gegl paramspecs
    
    This leak never happened because the duplicates are currently never
    freed.

 app/core/gimpparamspecs-duplicate.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/app/core/gimpparamspecs-duplicate.c b/app/core/gimpparamspecs-duplicate.c
index b9b271a..10671cd 100644
--- a/app/core/gimpparamspecs-duplicate.c
+++ b/app/core/gimpparamspecs-duplicate.c
@@ -264,7 +264,8 @@ gimp_param_spec_duplicate (GParamSpec *pspec)
       GHashTable *keys  = g_param_spec_get_qdata (pspec, quark);
 
       if (keys)
-        g_param_spec_set_qdata (copy, quark, g_hash_table_ref (keys));
+        g_param_spec_set_qdata_full (copy, quark, g_hash_table_ref (keys),
+                                     (GDestroyNotify) g_hash_table_unref);
     }
 
   return copy;