method.c (do_build_copy_constructor): Preserve cv qualifications when accessing source object members.

cp:
	* method.c (do_build_copy_constructor): Preserve cv
	qualifications when accessing source object members.
	(do_build_assign_ref): Likewise. Remove separate diagnostics for
	unnamed fields.
testsuite:
	* g++.old-deja/g++.other/op3.C: New test.

From-SVN: r37896