More 2.5.11 comments

[Bruce Lilly]

Additional comments:

1. gcc still bitches about the mismatch between %d and the long int
   yy_rule_linenum.  YY_rule_linenum should probably be an unsigned
   integral type; then the printf format could be %lu and the
   yy_rule_linenum arg in the printf statement could be cast to
   unsigned long.

2. yylex_init always returns 0, even if yyalloc failed due to
   lack of available memory.  Moreover, in that case,
   yy_init_globals() which is called by yylex_init will almost
   certainly cause a segmentation fault.  A possible fix:
        if ((*ptr_yy_globals = (yyscan_t) yyalloc ( sizeof( struct yyguts_t ), 
NULL )) == NULL)
                return 1;