[gimp] app: Use g_return_val_if_fail in gimp_palette_mru_add.

[Michael Henning <mhenning src gnome org>]

commit a94aa72d93b9554993996a494c3ca4e45983a6c7
Author: Michael Henning <drawoc darkrefraction com>
Date:   Thu Nov 27 11:51:28 2014 -0500

    app: Use g_return_val_if_fail in gimp_palette_mru_add.
    
    It's a non-void function.

 app/core/gimppalettemru.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/app/core/gimppalettemru.c b/app/core/gimppalettemru.c
index 49a4151..a991af1 100644
--- a/app/core/gimppalettemru.c
+++ b/app/core/gimppalettemru.c
@@ -194,8 +194,8 @@ gimp_palette_mru_add (GimpPaletteMru *mru,
   GList            *list;
   gint              max_changed;
 
-  g_return_if_fail (GIMP_IS_PALETTE_MRU (mru));
-  g_return_if_fail (color != NULL);
+  g_return_val_if_fail (GIMP_IS_PALETTE_MRU (mru), 0);
+  g_return_val_if_fail (color != NULL, 0);
 
   palette = GIMP_PALETTE (mru);