Add `Filename cannot be empty` warning to RequirePass.
Add `Filename cannot be empty` warning to RequirePass.

But only if E_WARNING is included in error_reporting(). Triggering an actual error is pretty ugly because we can't specify a fake filename or line number, so we don't worry about getting it in PsySH's "logged but not thrown" error handling.
bobthecow/psysh,bobthecow/psysh