cp:
	* class.c (modify_vtable_entry): Remove unused variable.
	(get_vcall_index): Always expect a non-thunk.
	(update_vtable_entry_for_fn): Combine covariant adjustments, when
	overriding a thunk. Pass get_vcall_index a non-thunk.

	* decl2.c (finish_file): Mark undefined inlines as extern.
testsuite:
	* g++.dg/inherit/covariant8.C: New test.

From-SVN: r60710