re PR c++/23491 (new declarator with constant expression gives "error: invalid use of array with unspecified bounds")

	PR c++/23491
	* cp-tree.h (build_vec_init): Adjust prototype.
	* init.c (perform_member_init): Adjust call to build_vec_init.
	(build_aggr_init): Likewise.
	(build_new_1): Do not call build_default_init for array types.
	(build_vec_init): Add explicit_default_init_p parameter.  Perform
	default initialization of vector elements when set.
	* typeck.c (build_modify_expr): Adjust call to build_vec_init.

	PR c++/23491
	* g++.dg/init/new14.C: New test.
	* g++.dg/expr/anew1.C: Do not XFAIL.
	* g++.dg/expr/anew2.C: Likewise.
	* g++.dg/expr/anew3.C: Likewise.

From-SVN: r103530