[[ Bug 13590 ]] As of iOS 8, the presence of a NSLocationWhenInUseUsageD...

...escription or a NSLocationAlwaysUsageDescription key value in the app's Info.plist

 file is required. It's then also necessary to request permission from the user prior to registering for location updates, either by calling
 [self.myLocationManager requestWhenInUseAuthorization] or [self.myLocationManager requestAlwaysAuthorization] depending on our need. The string we entered
 into the Info.plist will then be displayed in the ensuing dialog.
Use 'while(t_in_modal) MCscreen -> wait(1.0, False, True); // non-dispatching wait' here to make sure it blocks until the user has done something.