fix(geolocation): handle errors on watchPosition
fix(geolocation): handle errors on watchPosition

closes #322
ramonornela/ionic-native,xueron/ionic-native,driftyco/ionic-native,ramonornela/ionic-native,klirix/ionic-native,xueron/ionic-native,ramonornela/ionic-native,ramonornela/ionic-native,xueron/ionic-native,driftyco/ionic-native,klirix/ionic-native,klirix/ionic-native,driftyco/ionic-native,xueron/ionic-native