Fix: last position of given user shown incorrectly

helpers/position.php

@@ -77,15 +77,23 @@ class uPosition {
       return $positionId;
     }
 
-    public function getLast() {
+    public function getLast($userId = NULL) {
+      if (!empty($userId)) {
+        $where = "WHERE p.user_id = ?";
+        $params = [ 'i', $userId ];
+      } else {
+        $where = "";
+        $params = NULL;
+      }
       $query = "SELECT p.id, p.time, p.user_id, p.track_id, 
                 p.latitude, p.longitude, p.altitude, p.speed, p.bearing, p.accuracy, p.provider, 
                 p.comment, p.image_id, u.login, t.name 
                 FROM positions p 
                 LEFT JOIN users u ON (p.user_id = u.id) 
                 LEFT JOIN tracks t ON (p.track_id = t.id) 
+                $where
                 ORDER BY p.time DESC LIMIT 1";
-        $this->loadWithQuery($query);
+      $this->loadWithQuery($query, $params);
     }
 
     public function getAll($userId = NULL, $trackId = NULL) {