instead added an overload that doesn't take any arguments.  I did this
because -O3 sometimes makes gcc ignore more complex default arguments.
I don't actually have any cases where this happened to this function
but I'm changing it just to be safe.

--HG--
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%402549