[gnome-shell] polKitAgent: Don't crash when we cannot enable/disable the auth agent

[Adel Gadllah <agadllah src gnome org>]

commit dd6fe584754785f591e1c1733c71d7f362ab3690
Author: Adel Gadllah <adel gadllah gmail com>
Date:   Sun Nov 4 11:53:22 2012 +0100

    polKitAgent: Don't crash when we cannot enable/disable the auth agent
    
    This makes it easier to run with jhbuild.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=687556

 js/ui/components/polkitAgent.js |   12 ++++++++++--
 1 files changed, 10 insertions(+), 2 deletions(-)
---
diff --git a/js/ui/components/polkitAgent.js b/js/ui/components/polkitAgent.js
index d38dcdf..929b43e 100644
--- a/js/ui/components/polkitAgent.js
+++ b/js/ui/components/polkitAgent.js
@@ -335,11 +335,19 @@ const AuthenticationAgent = new Lang.Class({
     },
 
     enable: function() {
-        this._native.register();
+        try {
+            this._native.register();
+        } catch(e) {
+            log('Failed to register AuthenticationAgent');
+        }
     },
 
     disable: function() {
-        this._native.unregister();
+        try {
+            this._native.unregister();
+        } catch(e) {
+            log('Failed to unregister AuthenticationAgent');
+        }
     },
 
     _onInitiate: function(nativeAgent, actionId, message, iconName, cookie, userNames) {