c++: make finish_pseudo_destructor_expr SFINAE-aware [PR116417]

c++: make finish_pseudo_destructor_expr SFINAE-aware [PR116417]

	PR c++/116417

gcc/cp/ChangeLog:

	* cp-tree.h (finish_pseudo_destructor_expr): Add complain
	parameter.
	* parser.cc (cp_parser_postfix_dot_deref_expression): Pass
	complain=tf_warning_or_error to finish_pseudo_destructor_expr.
	* pt.cc (tsubst_expr): Pass complain to
	finish_pseudo_destructor_expr.
	* semantics.cc (finish_pseudo_destructor_expr): Check complain
	before emitting a diagnostic.

gcc/testsuite/ChangeLog:

	* g++.dg/template/pseudodtor7.C: New test.

Reviewed-by: Marek Polacek <polacek@redhat.com>
Reviewed-by: Jason Merrill <jason@redhat.com>