BUG/MINOR: fix listening IP address storage for frontends (cont)

Commit 6e6158 was incomplete. There was an additional aggregate copy
that may trigger a similar case in the future.

src/cfgparse.c

@@ -298,7 +298,7 @@ int str2listener(char *str, struct proxy *curproxy, struct bind_conf *bind_conf,
 			l->bind_conf = bind_conf;
 
 			l->fd = fd;
-			l->addr = ss;
+			memcpy(&l->addr, &ss, sizeof(ss));
 			l->xprt = &raw_sock;
 			l->state = LI_INIT;