reverted old code by accident

src/platformSpecific.ios.js

     }
   });
   ControllerRegistry.registerController(controllerID, () => Controller);
-  ControllerRegistry.setRootController(controllerID);
+  ControllerRegistry.setRootController(controllerID, params.animationType, params.passProps || {});
 }
 
 function startSingleScreenApp(params) {
     }
   });
   ControllerRegistry.registerController(controllerID, () => Controller);
-  ControllerRegistry.setRootController(controllerID);
+  ControllerRegistry.setRootController(controllerID, params.animationType, params.passProps || {});
 }
 
 function _mergeScreenSpecificSettings(screenID, screenInstanceID, params) {