[gnome-shell] window-tracker: Fix minor style issue

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

commit 49fcc93a4b84fb3aeda6a5c5f4b1aa29aa4d7f51
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Sun Oct 12 17:20:12 2014 -0700

    window-tracker: Fix minor style issue

 src/shell-window-tracker.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/shell-window-tracker.c b/src/shell-window-tracker.c
index 2b82201..512f7ec 100644
--- a/src/shell-window-tracker.c
+++ b/src/shell-window-tracker.c
@@ -507,7 +507,7 @@ disassociate_window (ShellWindowTracker   *self,
   g_hash_table_remove (self->window_to_app, window);
 
   _shell_app_remove_window (app, window);
-  g_signal_handlers_disconnect_by_func (window, G_CALLBACK(on_wm_class_changed), self);
+  g_signal_handlers_disconnect_by_func (window, G_CALLBACK (on_wm_class_changed), self);
 
   g_signal_emit (self, signals[TRACKED_WINDOWS_CHANGED], 0);