UnboundLocalError raised when clear gw on a router

[Wu Wenxiang]

Reproduce Step:
1. Clear gw on a router
2. Any err happened during clearing gw
3. UnboundLocalError raised

Version
1. Grizzly
2. Master

Log:
UnboundLocalError at /project/routers/
local variable 'msg' referenced before assignment
Exception Location: /home/trystack/src/horizon/openstack_dashboard/wsgi/../../openstack_dashboard/dashboards/project/routers/tables.py in action, line 92

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/30748

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/30748
Committed: http://github.com/openstack/horizon/commit/70277cd581c5d803c2209bb2a9789e080dc0dcc0
Submitter: Jenkins
Branch: master

commit 70277cd581c5d803c2209bb2a9789e080dc0dcc0
Author: Wu Wenxiang <[e-mail]>
Date: Tue May 28 23:27:22 2013 +0800

    Correct exception msg in ClearGateway::action

        Bug:1185059
        UnboundLocalError raised when clear gw on a router

    Change-Id: I0dda29eb1d55ab551ac43a8ca20529fff9e689c8