[patch] PR c++/18738: backport to 3.4 branch

[Gabriel Dos Reis]

Volker Reichelt <reichelt@igpm.rwth-aachen.de> writes:

| Straight forward backport of a mainline patch.
| 
| I omitted some comment-only changes and a small bogus hunk at the end
| of decl.c, see http://gcc.gnu.org/ml/gcc-patches/2005-09/msg00315.html
| 
| Bootstrapped and regtested on i686-pc-linux-gnu.
| OK for 3.4 branch?

Yes, thanks.

-- Gaby