Fix a bug if you have no roles at all
Fix a bug if you have no roles at all

This could not happen currently, but might happen later on if a group
is defined that does not have an 'anybody' membership.

Patch by: Sverre Rabbelier

MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging