[mutter] window: Don't treat an output_id of 0 as an invalid ID

[Jasper St. Pierre <jstpierre src gnome org>]

commit 42c972735e14ecaa98fa05818c722ab6bc5d7925
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Tue Jul 1 13:18:31 2014 -0400

    window: Don't treat an output_id of 0 as an invalid ID

 src/core/window.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/core/window.c b/src/core/window.c
index 1a8bdcf..e1300b2 100644
--- a/src/core/window.c
+++ b/src/core/window.c
@@ -3536,7 +3536,7 @@ find_monitor_by_id (MetaWindow *window,
     {
       MetaMonitorInfo *info = &window->screen->monitor_infos[i];
 
-      if (info->output_id != 0 && info->output_id == id)
+      if (info->output_id == id)
         return info;
     }