(isc_bindtcp): Pass the proper size to bind() for IPv4 and IPv6.

src/libraries/libisc-new/src/isc_tcp.c

@@ -314,7 +314,9 @@ isc_bindtcp(IscSession *scb,
 		  ! (ia = isc_mktcpaddress(address, service, af))
 		  || (bind(scb->fd,
 			   (struct sockaddr *) &ia->ip.saddr,
-			   sizeof(ia->ip.saddr)) < 0)))
+			   CHOOSE_IP4OR6(ia->ip.saddr,
+					 sizeof(struct sockaddr_in),
+					 sizeof(struct sockaddr_in6))) < 0)))
     return -1;
 
   scb->info.tcp.laddr = ia;