* c-tree.h (struct c_declarator): New id_loc field.
	* c-pragma.h (c_lex_with_flags): Take position reference.
	* c-lex.c (c_lex_with_flags): Set passed-in location from cpp token,
	iff USE_MAPPED_LOCATION. (Type doesn't match otherwise.)
	(c_lex): Pass dummy location to c_lex_with_flags.
	* c-parser.c (c_lex_one_token): Set c_token's location using
	c_lex_with_flags, instead of input_location, which might be "ahead".
	(c_parser_direct_declarator): Set declarator's id_loc from
	c_token's id_loc.
	* c-decl.c (grokdeclarator): Set DECL_SOURCE_LOCATION from
	declarator's id_loc, rather than probably-imprecise input_location.
	(build_id_declarator): Initialize c_declarator's id_loc field.

From-SVN: r96329