[mutter] window: Fix typo in comment

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

commit 292d502205f67291b2112eedb6215b7606ba1197
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Thu May 1 15:04:09 2014 -0400

    window: Fix typo in comment

 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 901e4d4..6f4ce1f 100644
--- a/src/core/window.c
+++ b/src/core/window.c
@@ -3936,7 +3936,7 @@ adjust_for_gravity (MetaWindow        *window,
  *
  * Gets whether the compositor should be updating the window contents;
  * window content updates may be frozen at client request by setting
- * an odd value in the extended _NET_WM_SYNC_REQUEST_COUNTER counter r
+ * an odd value in the extended _NET_WM_SYNC_REQUEST_COUNTER counter
  * by the window manager during a resize operation while waiting for
  * the client to redraw.
  *