dofile() in 5.0 - no such file

[Michael Naunton <mmn@...>]

In 4.0, I'd write something like:

if( not dofile( os.getenv("HOME") .. "/.ps2luarc" )) then
   print( "no user config file - using defaults." );
end

what's the right way to do this in 5.0 -- i.e. dealing gracefully in 
cases where the file does not exist?

Thanks,
Michael