File warning-fix-lib-crypto-des.dif of Package krb5

# 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
#
--- src/lib/crypto/des/string2key.c
+++ src/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