* pt.c (convert_nontype_argument): Move check for is_overloaded_fn
early to avoid bogus error. Handle overloaded function
names provided as template arguments correctly.
(coerce_template_parms): Don't mishandle overloaded functions when
dealing with template template parameters.
(lookup_template_class): Issue an error message, rather than
crashing, when the TYPE_DECL provided is not a template type.
From-SVN: r17552
