PR c++/69912 - [6 regression] ICE in build_ctor_subob_ref initializing
	a flexible array member

gcc/testsuite/ChangeLog:
2016-02-24  Martin Sebor  <msebor@redhat.com>

	PR c++/69912
	* g++.dg/ext/flexary15.C: New test.

gcc/cp/ChangeLog:
2016-02-24  Martin Sebor  <msebor@redhat.com>

	PR c++/69912
	* tree.c (build_ctor_subob_ref): Compare types' main variants
        instead of the types as they are.

From-SVN: r233678