Unsigned char cast for ctype func in uniq(1)

[Michael McConville]

ok?


Index: usr.bin/uniq/uniq.c
===================================================================
RCS file: /cvs/src/usr.bin/uniq/uniq.c,v
retrieving revision 1.22
diff -u -p -r1.22 uniq.c
--- usr.bin/uniq/uniq.c 9 Oct 2015 01:37:09 -0000       1.22
+++ usr.bin/uniq/uniq.c 2 Nov 2015 17:17:13 -0000
@@ -214,7 +214,7 @@ obsolete(char *argv[])
                                return;
                } else if (ap[1] == '-')
                        return;
-               if (!isdigit(ap[1]))
+               if (!isdigit((unsigned char)ap[1]))
                        continue;
                /*
                 * Digit signifies an old-style option.  Malloc space for dash,