Adding check for no default home before registering new receiver

            // as uninstalling the app or removing the "Launcher" feature in an update).

            // Listen for package updates of this app (and remove any previously attached

            // package listener).

            if (!defaultHome.getPackageName().equals(mUpdateRegisteredPackage)) {

            if (defaultHome == null) {

                if (mUpdateRegisteredPackage != null) {

                    mContext.unregisterReceiver(mOtherHomeAppUpdateReceiver);

                }

            } else if (!defaultHome.getPackageName().equals(mUpdateRegisteredPackage)) {

                if (mUpdateRegisteredPackage != null) {

                    mContext.unregisterReceiver(mOtherHomeAppUpdateReceiver);

                }