re PR c++/4203 (empty base class optimization zeroes first byte of other base class when using multiple inheritance)

cp:
	PR c++/4203
	* call.c (build_over_call): Do not optimize any empty base
	construction.
testsuite:
	PR c++/4203
	* g++.old-deja/g++.other/empty1.C: XFAIL. See PR c++/4222
	* g++.dg/init/empty1.C: New test.

From-SVN: r45374