[Bugs] #4605 Sugar URGE: "View Source" crashes in web activities

[Sugar Labs Bugs]

#4605: "View Source" crashes in web activities
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       Reporter:  manuq        |       Owner:  manuq
           Type:  defect       |      Status:  new
       Priority:  Urgent       |   Milestone:  Unspecified
      Component:  Sugar        |     Version:  Unspecified
       Severity:  Unspecified  |    Keywords:
Distribution/OS:  Unspecified  |  Bug Status:  Unconfirmed
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 I will own this one.  Traceback:

 {{{
 1376683141.083415 DEBUG ViewSource: ViewSource paths:
 '/home/manuq/Activities/GearsActivity.activity' None None
 Traceback (most recent call last):
   File "/home/manuq/prog/sugar-build/build/out/install/lib/python2.7/site-
 packages/jarabe/view/palettes.py", line 122, in __view_source__cb
     setup_view_source(self._home_activity)
   File "/home/manuq/prog/sugar-build/build/out/install/lib/python2.7/site-
 packages/jarabe/view/viewsource.py", line 109, in setup_view_source
     sugar_toolkit_path, activity.get_title())
   File "/home/manuq/prog/sugar-build/build/out/install/lib/python2.7/site-
 packages/jarabe/view/viewsource.py", line 180, in __init__
     self._selected_sugar_file = os.path.join(sugar_toolkit_path,
 file_name)
   File "/usr/lib64/python2.7/posixpath.py", line 68, in join
     elif path == '' or path.endswith('/'):
 AttributeError: 'NoneType' object has no attribute 'endswith'
 }}}
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Ticket URL: <http://bugs.sugarlabs.org/ticket/4605>
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