Ticket History #3913: krb5-1.5: fix warnings in lib/crypto/des/string2key.c

fix warning:
string2key.c: In function 'mit_des_string_to_key_int':
string2key.c:229: warning: pointer targets in passing argument 1 of
'mit_des_cbc_cksum' differ in signedness

# fix warning:
# string2key.c: In function 'mit_des_string_to_key_int':
# string2key.c:229: warning: pointer targets in passing argument 1 of 'mit_des_cbc_cksum' differ in signedness
#
--- lib/crypto/des/string2key.c
+++ lib/crypto/des/string2key.c 2006/06/21 08:16:12
@@ -44,7 +44,7 @@
krb5_ui_4 x, y, z;
unsigned char *p;
des_key_schedule sched;
- char *copy;
+ unsigned char *copy;
size_t copylen;

/* As long as the architecture is big-endian or little-endian, it