[Bug c++/48771] [C++0x] is_literal_type incorrect for references to non-literal types

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48771

--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> 2011-04-27 03:58:16 UTC ---
Looks fine, but also remove the REFERENCE_TYPE check in
valid_type_in_constexpr_fundecl_p.