Limit to one X screen

Author: John Stowers <john.stowers@gmail.com>

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--- mutter-3.4.1.orig/src/core/display.c
+++ mutter-3.4.1/src/core/display.c
@@ -818,7 +818,7 @@ meta_display_open (void)
   screens = NULL;
   
   i = 0;
-  while (i < ScreenCount (xdisplay))
+  while (i < 1/*ScreenCount (xdisplay)*/)
     {
       MetaScreen *screen;
 
