[mutter] screen: Remove harmless leftover argument

[Rui Matos <rtcm src gnome org>]

commit fd404bafc82dbaf8ad1af0981f0cc2c497f686f5
Author: Rui Matos <tiagomatos gmail com>
Date:   Thu Jan 26 02:50:48 2012 +0000

    screen: Remove harmless leftover argument
    
    It compiled because it was picking index(3) from strings.h.

 src/core/screen.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/core/screen.c b/src/core/screen.c
index 0c742b5..72cc2c1 100644
--- a/src/core/screen.c
+++ b/src/core/screen.c
@@ -2980,7 +2980,7 @@ meta_screen_resize (MetaScreen *screen,
   g_free (old_monitor_infos);
   g_slist_free (windows);
 
-  g_signal_emit (screen, screen_signals[MONITORS_CHANGED], 0, index);
+  g_signal_emit (screen, screen_signals[MONITORS_CHANGED], 0);
 }
 
 void