* data/push.c (union yyalloc): Rename yyss, yyvs, and yyls fields to

* data/push.c (union yyalloc): Rename yyss, yyvs, and yyls fields to
prevent a name collision in a future patch where these names will
sometimes be #define'd.
(YYSTACK_RELOCATE): Add an argument to select a union yyalloc field
since it no longer has the same name as the existing argument.
(yyparse or yypush_parse): Update all uses of YYSTACK_RELOCATE.