c++/9278: Illegal use of typedef to "void"

[Giovanni Bajo]

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&p
r=9278

Reconfirmed for 2.95 -> 3.3 as of today (bump [date] please).
Notice that the description of the bug is misleading: "This fails to
compile; I don't think it should." should be "This compiles correctly, but
it should not". Bug class is not "sw-bug" but "accept-illegal".

Giovanni Bajo