C++ PATCH to build_over_call for c++/5995

[Jason Merrill]

We don't need to suppress copy elision for empty classes if they have a
non-trivial copy constructor, as any copies will be done via said
constructor, which is presumably smart enough not to write on the padding.
Am I missing something?

Tested i686-pc-linux-gnu.  Applied trunk, 3.0 and 3.1.
Fixes g++.other/empty1.C.

2002-03-18  Jason Merrill  <jason@redhat.com>

	PR c++/5995
	* call.c (build_over_call): Fix empty class logic.

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