saltstack/salt — pull request #6525 by terminalmage (2013-08-05 22:51:32+00:00)
Title: Fix traceback with malformed requisites

This fixes #6521 by skipping any requisites that have a value of None.
Additionally, the state output for failed requisites has been cleaned up
a bit. See the following link for an example:

https://github.com/saltstack/salt/issues/6521#issuecomment-22146254