[gegl] gegl_operation_list_property_keys: fix to return more than one key

[Øyvind Kolås <ok src gnome org>]

commit 9837fa04e29cc2b59d6ddc1d7de603c5e8901196
Author: Øyvind Kolås <pippin gimp org>
Date:   Sat May 24 18:55:19 2014 +0200

    gegl_operation_list_property_keys: fix to return more than one key

 gegl/operation/gegl-operation-property-keys.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gegl/operation/gegl-operation-property-keys.c b/gegl/operation/gegl-operation-property-keys.c
index 63bfe76..bff65f7 100644
--- a/gegl/operation/gegl-operation-property-keys.c
+++ b/gegl/operation/gegl-operation-property-keys.c
@@ -111,7 +111,7 @@ gegl_operation_list_property_keys (const gchar *operation_name,
     count = g_hash_table_size (ht);
     ret = g_malloc0 (sizeof (gpointer) * (count + 1));
     list = g_hash_table_get_keys (ht);
-    for (i = 0, l = list; l; l = l->next)
+    for (i = 0, l = list; l; l = l->next, i++)
       {
         ret[i] = l->data;
       }