[glade/offscreen-design-layout] Fixed glade-signal.c return_if_fail() statement.

[Juan Pablo Ugarte <jpu src gnome org>]

commit 3595ef1da8e19ad34eb6bcdf427e8a7e1712e567
Author: Tristan Van Berkom <tristan van berkom gmail com>
Date:   Thu Jan 13 19:13:50 2011 +0900

    Fixed glade-signal.c return_if_fail() statement.

 gladeui/glade-signal.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gladeui/glade-signal.c b/gladeui/glade-signal.c
index 77c8d1a..031e4c0 100644
--- a/gladeui/glade-signal.c
+++ b/gladeui/glade-signal.c
@@ -238,7 +238,7 @@ glade_signal_new (const GladeSignalClass* sig_class,
 		  gboolean after, 
 		  gboolean swapped)
 {
-  g_return_if_fail (sig_class != NULL);
+  g_return_val_if_fail (sig_class != NULL, NULL);
 
   return (GladeSignal *)g_object_new (GLADE_TYPE_SIGNAL,
 				      "class", sig_class,