backport: re PR c++/90947 (Simple lookup table of array of strings is miscompiled)

backport: re PR c++/90947 (Simple lookup table of array of strings is miscompiled)

	Backported from mainline
	2019-10-31  Jakub Jelinek  <jakub@redhat.com>

	PR c++/90947
	* tree.h (type_initializer_zero_p): Remove.
	* tree.c (type_initializer_zero_p): Remove.

	* cp-tree.h (type_initializer_zero_p): Declare.
	* decl.c (reshape_init_array_1): Formatting fix.
	* tree.c (type_initializer_zero_p): New function.  Moved from
	../tree.c, use next_initializable_field, formatting fix.  Return
	false for TYPE_NON_AGGREGATE_CLASS types.

From-SVN: r277985