[four-in-a-row] Fix "Non-void function should return a value"

[Michael Catanzaro <mcatanzaro src gnome org>]

commit cf54d83b3117b4d6ebbc743bb9aa404321fa71b6
Author: Ting-Wei Lan <lantw src gnome org>
Date:   Fri Sep 19 23:00:29 2014 +0800

    Fix "Non-void function should return a value"
    
    https://bugzilla.gnome.org/show_bug.cgi?id=736980

 src/main.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/main.c b/src/main.c
index 96701a4..2259a8a 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1112,7 +1112,7 @@ create_app (void)
   if (G_UNLIKELY (error != NULL)) {
       fprintf (stderr, "Could not load UI: %s\n", error->message);
       g_clear_error (&error);
-      return;
+      return FALSE;
   }
   gtk_style_context_add_provider_for_screen (gdk_screen_get_default (), css_provider, 
GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);