re PR c++/20142 (implicit assignment operator with multi-dimensional array is broken)

re PR c++/20142 (implicit assignment operator with multi-dimensional array is broken)

	PR c++/20142
	* cp-tree.h (target_type): Remove.
	* decl.c (layout_var_decl): Remove #if 0'd code.
	(cp_finish_decl): Remove dead code.
	* init.c (build_vec_init): When determining whether or not the
	element type has an asignment operator, look through all array
	dimensions.
	* typeck.c (target_type): Remove.

	PR c++/20142
	* g++.dg/init/array18.C: New test.

From-SVN: r96170