[mutter] window: Placate new gcc

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

commit b3544f8ec17a8282d9d226dd170e241cef9e8d6c
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Thu Oct 23 16:03:46 2014 -0700

    window: Placate new gcc
    
    It thinks remaining can be used uninitialized. It's wrong, but let's
    help it out by initializing the variable.

 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 8ef7581..7a5ea20 100644
--- a/src/core/window.c
+++ b/src/core/window.c
@@ -5851,7 +5851,7 @@ update_resize (MetaWindow *window,
   int new_w, new_h;
   int gravity;
   MetaRectangle old;
-  double remaining;
+  double remaining = 0;
   MetaMaximizeFlags new_unmaximize;
 
   window->display->grab_latest_motion_x = x;