Quash a load of compile warnings

Kevin Lyda writes:
I enclose the following patch which removes all but three of the warnings.  i
don't have any non-linux systems handy to test a fix to the round() function.
but having it return a double should be fine.

It doesn't actually fix anything, it just shuts up -Wall, so it's certainly an
optional type of patch.

nameserv.c

@@ -39,7 +39,7 @@ unsigned long
 DNS_Name2IPAddress(const char *name)
 {
   struct hostent *host;
-  unsigned char *address0;
+  char *address0;
   unsigned long result;
 
   host = gethostbyname(name);