[patch] const cclasses reference in ksh

[Matthew Martin]

Recently cclasses in lib/libc/gen/charclass.h was made const.[1]
Mark the pointer used to walk the array in ksh const as well.

1: https://marc.info/?l=openbsd-cvs&m=160256416506433&w=2


diff --git misc.c misc.c
index 9e6e9db5e76..7226f74eccf 100644
--- misc.c
+++ misc.c
@@ -713,7 +713,7 @@ do_gmatch(const unsigned char *s, const unsigned char *se,
 static int
 posix_cclass(const unsigned char *pattern, int test, const unsigned char **ep)
 {
-       struct cclass *cc;
+       const struct cclass *cc;
        const unsigned char *colon;
        size_t len;
        int rval = 0;