* constexpr.c (fold_non_dependent_expr): Add complain parm.
	* call.c, expr.c, init.c, pt.c, semantics.c, typeck.c, typeck2.c:
	Pass it.
	* call.c (build_cxx_call): Don't mess with builtins in a template.
	* typeck2.c (store_init_value): If fold_non_dependent_expr didn't
	produce a constant value, go back to the uninstantiated form.

From-SVN: r261972