[metacity] display: fix copy/paste typo

[Alberts Muktupāvels <muktupavels src gnome org>]

commit eb7ca21001f804da77836d3bc1203ed7d0708b63
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sun Mar 5 15:54:29 2017 +0200

    display: fix copy/paste typo

 src/core/display.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/core/display.c b/src/core/display.c
index 31a0e43..6112a30 100644
--- a/src/core/display.c
+++ b/src/core/display.c
@@ -1856,7 +1856,7 @@ event_callback (XEvent   *event,
         }
     }
 
-  if (window && window && !window->override_redirect &&
+  if (window && !window->override_redirect &&
       ((event->type == KeyPress) || (event->type == ButtonPress)))
     {
       if (CurrentTime == display->current_time)