cp-tree.h: Tweak documentation.

cp-tree.h: Tweak documentation.

	* cp-tree.h: Tweak documentation.
	* class.c (build_vbase_pointer_fields): Layout the fields, too.
	(avoid_overlap): Remove.
	(get_binfo_offset_as_int): New function.
	(dfs_serach_base_offsets): Likewise.
	(layout_nonempty_base_or_field): Likewise.
	(build_base_field): Layout fields here.  Avoid placing two objects
	of the same type at the same address, under the new ABI.
	(build_base_fields): Adjust accordingly.
	(create_vtable_ptr): Return the new field, but don't attach it to
	TYPE_FIELDS.
	(remove_base_field): Remove.
	(remove_base_fields): Remove.
	(layout_basetypes): Adjust accordingly.
	(layout_class_type): Call layout_field for each field, rather than
	just making a wholesale call to layout_type.

From-SVN: r32550