[gnome-shell] keyboard: Fix a warning

[Florian MÃllner <fmuellner src gnome org>]

commit 65bf0d20e74bd5972e19341561f2c79ba77d1ea9
Author: Florian MÃllner <fmuellner gnome org>
Date:   Fri Feb 1 01:22:15 2013 +0100

    keyboard: Fix a warning
    
    While we handle the case where ibus_bus_get_global_engine() returns
    NULL, this case actually generates an exception we have to catch to
    avoid some (harmless) console spam.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=692995

 js/ui/status/keyboard.js |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)
---
diff --git a/js/ui/status/keyboard.js b/js/ui/status/keyboard.js
index f091418..15e14d8 100644
--- a/js/ui/status/keyboard.js
+++ b/js/ui/status/keyboard.js
@@ -115,9 +115,14 @@ const IBusManager = new Lang.Class({
             this._panelService.connect('update-property', Lang.bind(this, this._updateProperty));
             // If an engine is already active we need to get its properties
             this._ibus.get_global_engine_async(-1, null, Lang.bind(this, function(i, result) {
-                let engine = this._ibus.get_global_engine_async_finish(result);
-                if (!engine)
+                let engine;
+                try {
+                    engine = this._ibus.get_global_engine_async_finish(result);
+                    if (!engine)
+                        return;
+                } catch(e) {
                     return;
+                }
                 this._engineChanged(this._ibus, engine.get_name());
             }));
             this._updateReadiness();