Change a char that is used as an index into an array into an unisgned char.

Add a missing new style function definition.

usr.bin/ctags/ctags.c

@@ -244,7 +244,7 @@ void
 init(void)
 {
 	int		i;
-	const char	*sp;
+	const unsigned char	*sp;
 
 	for (i = 0; i < 256; i++) {
 		_wht[i] = _etk[i] = _itk[i] = _btk[i] = NO;

usr.bin/ctags/fortran.c

@@ -52,7 +52,7 @@ static void takeprec(void);
 char *lbp;				/* line buffer pointer */
 
 int
-PF_funcs()
+PF_funcs(void)
 {
 	bool	pfcnt;			/* pascal/fortran functions found */
 	char	*cp;