Missing import in setup_command.py

[Sebastian Wiesner]

Hello list,

I need to admit, that I failed to add a required import for SystemMessage 
class in setup_command.py.  The attached patch fixes this.  Sorry for the 
inconvenience.

-- 
Freedom is always the freedom of dissenters.
                                      (Rosa Luxemburg)

Index: sphinx/setup_command.py
===================================================================
--- sphinx/setup_command.py	(Revision 65858)
+++ sphinx/setup_command.py	(Arbeitskopie)
@@ -81,6 +81,8 @@
             else:
                 app.builder.build_update()
         except Exception, err:
+            from docutils.utils import SystemMessage
+
             if isinstance(err, SystemMessage):
                 sys.stderr, darkred('reST markup error:')
                 print >>sys.stderr, err.args[0].encode('ascii', 'backslashreplace')

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