cylc/cylc — pull request #1042 by benfitzpatrick (2014-07-30 09:26:04+00:00)
Title: #119: fix graphing exception

Currently, when running `cylc graph`, we get:
```
Traceback (most recent call last):
File "/opt/cylc/bin/cylc-graph", line 217, in
start_point_string, stop_point_string )
File "/opt/cylc/lib/cylc/cylc_xdot.py", line 296, in __init__
self.start_point_string = start_point_string
NameError: global name 'start_point_string' is not defined
```
This fixes the traceback and allows all the tests to pass.

@matthewrmshin, please review.