title: QML Map.center trouble in QT5.7
body: <p>I try to upgrade Qt 5.6 project up to 5.7 and get some trouble with QML Map. I have a simple project with such code:</p>
  
  <pre class="lang-js prettyprint-override"><code>Plugin {
      id: myPlugin
      name: "osm"
      PluginParameter {
          name: "osm.mapping.host";
          value: "http://a.tile.openstreetmap.org/"
      }
  }
  
  Map {
      id: map
      anchors.fill: parent
      plugin: myPlugin;
      center: QtPositioning.coordinate(55.7512, 37.6175)
      zoomLevel: 12
      activeMapType: map.supportedMapTypes[6] //some magic to work
  }
  </code></pre>
  
  <p>It works in 5.6 - I have all spots on map wich I define as <code>QtPositioning.coordinate()</code>. And it works in 5.7 too - with all my spots, except one thing - in 5.7 my map starts in the middle of Africa instead of coordinates I pointed at <code>Map.center</code>.</p>
  
  <p>I tried running example from QtCreator - it had the same problem. So, I'd be glad to any advice.</p>