Fix PR c++/40239

gcc/cp/ChangeLog:
	PR c++/40239
	* typeck2.c (process_init_constructor_record):
	value-initialize members that are are not explicitely
	initialized.

gcc/testsuite/ChangeLog:
	PR c++/40239
	* g++.dg/init/aggr5.C: New test.
	* g++.dg/init/aggr5.C: New test.

From-SVN: r158066