Fix use of inet_ntop() in rblchk()

Aren't void pointers fun!?!

src/sbbs3/mailsrvr.c

@@ -1915,7 +1915,7 @@ static in_addr_t rblchk(SOCKET sock, const char* prot, union xp_sockaddr *addr,
 		char tmp[128];
 		result = ((struct sockaddr_in*)res->ai_addr)->sin_addr.s_addr;
 		lprintf(LOG_INFO, "%04d %s DNSBL Query: %s resolved to: %s"
-		    , sock, prot, name, inet_ntop(AF_INET, res->ai_addr, tmp, sizeof tmp));
+		    , sock, prot, name, inet_ntop(AF_INET, &((struct sockaddr_in*)res->ai_addr)->sin_addr, tmp, sizeof tmp));
 	}
 	freeaddrinfo(res);
 	return result;