expr.c (get_inner_reference): Use DECL_UNSIGNED, not TREE_UNSIGNED.

	* expr.c (get_inner_reference): Use DECL_UNSIGNED, not TREE_UNSIGNED.
	* stor-layout.c (layout_decl): Likewise.
	* tree.c (get_narrower): Likewise and also use BIT_FIELD_REF_UNSIGNED.
	* fold-const.c (make_bit_field_ref): Use BIT_FIELD_REF_UNSIGNED.
	* print-tree.c (print_node): Handle various used of unsigned_flag.
	* tree.def (BIT_FIELD_REF): Update comment.
	* tree.h (TREE_UNSIGNED): Deleted.
	(DECL_UNSIGNED, BIT_FIELD_REF_UNSIGNED): New macros.

	* cp/class.c (VTT_TOP_LEVEL_P): Use unsigned_flag directly.

	* f/com.c (ffe_truthvalue_conversion, case COMPONENT_REF):
	Use DECL_UNSIGNED and integer_onep.

From-SVN: r80293