PR c++/42844
	* decl.c (check_for_uninitialized_const_var): Handle classes that need
	constructing, too.
	(check_initializer): Call it for classes that need constructing, too.
	* class.c (in_class_defaulted_default_constructor): New.
	* cp-tree.h: Declare it.

Co-Authored-By: Jason Merrill <jason@redhat.com>

From-SVN: r158797