[tree-ssa mudflap] C++ tweaks

[Gabriel Dos Reis]

"Frank Ch. Eigler" <fche@redhat.com> writes:

| +#if 0
| +	warning_with_decl (obj, "ignoring system extern decl `%s'",
| +			   IDENTIFIER_POINTER (DECL_NAME (obj)));
| +#endif

We no longer believe in #if 0.  And please don't use any of the
*_with_decl() diagnostic function.  Just use %D if you're talking
about a decl.

-- Gaby