[gnome-shell-extensions] dock: update for gnome-shell API changes

[Giovanni Campagna <gcampagna src gnome org>]

commit 1463a6481ea98ad3d51ff5b4ba2a9788d776cb9e
Author: Giovanni Campagna <gcampagna src gnome org>
Date:   Thu Mar 1 21:04:25 2012 +0100

    dock: update for gnome-shell API changes
    
    Shell.get_event_state() was removed, use direct .get_state()
    instead.

 extensions/dock/extension.js |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/extensions/dock/extension.js b/extensions/dock/extension.js
index 63bfa8f..3b8036f 100644
--- a/extensions/dock/extension.js
+++ b/extensions/dock/extension.js
@@ -729,7 +729,7 @@ const DockIcon = new Lang.Class({
 
     _onActivate: function (event) {
         this.emit('launching');
-        let modifiers = Shell.get_event_state(event);
+        let modifiers = event.get_state();
 
         if (modifiers & Clutter.ModifierType.CONTROL_MASK
             && this.app.state == Shell.AppState.RUNNING) {