Bison 3.5 - y.tab.c generates compiler warnings

Hi all,

I have just updated Bison to version 3.5 for the OmniOS operating system,
an illumos distribution, and have found that building the ACPI iasl
utility generates new compiler warnings like this:

	y.tab.c: In function 'yy_reduce_print':
	y.tab.c:1029:30: error: array subscript has type 'char' [-Werror=char-subscripts]
	y.tab.c: In function 'yysyntax_error':
	y.tab.c:1207:23: error: array subscript has type 'char' [-Werror=char-subscripts]
	y.tab.c: In function 'DtParserparse':
	y.tab.c:1959:25: error: array subscript has type 'char' [-Werror=char-subscripts]

This is caused by the change of type for state numbers in this commit:

https://git.savannah.gnu.org/cgit/bison.git/commit/?id=67dcef357cd33fab4c11d51ccabc0c8aae4ae933

	/* On this platform */
	typedef unsigned char yytype_uint8;
	typedef yytype_uint8 yy_state_num;

As opposed to:

	yytype_int16

before.

I've patched the (iasl) Makefile to disable these compiler checks for the
generated files but wanted to report it here too.

Regards,

Andy