trynextip: don't store 'ai' on failed connects...

It leads to the "next family" tries starting from the wrong point and thus
fails!

Bug: http://curl.haxx.se/bug/view.cgi?id=1337
Reported-by: ricker

lib/connect.c

@@ -570,11 +570,11 @@ static CURLcode trynextip(struct connectdata *conn,
 
       if(ai) {
         rc = singleipconnect(conn, ai, &conn->tempsock[tempindex]);
-        conn->tempaddr[tempindex] = ai;
         if(rc == CURLE_COULDNT_CONNECT) {
           ai = ai->ai_next;
           continue;
         }
+        conn->tempaddr[tempindex] = ai;
       }
       break;
     }