[polari] mainWindow: Add missing return value

[Florian Müllner <fmuellner src gnome org>]

commit 8be5b68636d0889bd027ea6cdaee9dc2ae9453c0
Author: Florian Müllner <fmuellner gnome org>
Date:   Fri Nov 28 15:27:36 2014 +0000

    mainWindow: Add missing return value
    
    There's nothing to bubble up to from a toplevel widget, but it's
    still cleaner to return an explicit value when expected.

 src/mainWindow.js |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/mainWindow.js b/src/mainWindow.js
index 90b0627..0cefb5f 100644
--- a/src/mainWindow.js
+++ b/src/mainWindow.js
@@ -88,9 +88,9 @@ const MainWindow = new Lang.Class({
         this.window.connect_after('key-press-event', Lang.bind(this,
             function(w, event) {
                 let [, keyval] = event.get_keyval();
-                if (keyval == Gdk.KEY_Escape) {
+                if (keyval == Gdk.KEY_Escape)
                     this._selectionModeAction.change_state(GLib.Variant.new('b', false));
-                }
+                return Gdk.EVENT_STOP;
             }));
         this.window.connect('window-state-event',
                             Lang.bind(this, this._onWindowStateEvent));