* typeck.c (build_indirect_ref): Complain about a pointer to data
	member, too.
	* typeck2.c (build_m_component_ref): Don't indirect a pointer to
	data member.
	* init.c (resolve_offset_ref): Don't undo the above.
	* cp-tree.h (DECL_C_BIT_FIELD, SET_DECL_C_BIT_FIELD): New macros.
	(struct lang_decl_flags): Add `bitfield'.
	* class.c (finish_struct_1): Use DECL_C_BIT_FIELD instead of
	DECL_BIT_FIELD.
	* decl2.c (grokbitfield, grok_alignof): Likewise.
	* init.c (build_offset_ref): Likewise.
	* typeck.c (build_component_addr, expr_sizeof): Likewise.
	* cvt.c (build_up_reference): Don't crash if taking the address
	returns error_mark_node.

From-SVN: r23124