Added getArg(), mainly so that it can be used when dispatching and overridden in subclasses.
Added getArg(), mainly so that it can be used when dispatching
and overridden in subclasses.


git-svn-id: b675b909355d5cf946977f44a8ec5a6ceb3782e4@802 ed5b42cb-e716-0410-a449-f6a68f950b19

threerings/nenya,threerings/nenya