Fix for camera data not updated in changeActiveMapType

This patch forces a camera data update upon changeActiveMapType, which
may change the tile size.

Change-Id: Ib371ea7f76267bc4ed8a30eed31ec3887b4a1415
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>

src/location/maps/qgeotiledmap.cpp

@@ -340,7 +340,8 @@ void QGeoTiledMapPrivate::changeActiveMapType(const QGeoMapType mapType)
     m_mapScene->setTileSize(m_cameraCapabilities.tileSize());
     m_visibleTiles->setMapType(mapType);
     m_prefetchTiles->setMapType(mapType);
-    updateScene();
+    changeCameraData(m_cameraData); // Updates the zoom level to the possibly new tile size
+    // updateScene called in changeCameraData()
 }
 
 void QGeoTiledMapPrivate::changeTileVersion(int version)