avoid uninstall to fail if nothing was installed before
avoid uninstall to fail if nothing was installed before

VTCSecureLLC/ortp,carpikes/ortp,Distrotech/oRTP,carpikes/ortp,VTCSecureLLC/ortp,Linphone-sync/oRTP,jiangjianping/ortp,carpikes/ortp,Linphone-sync/oRTP,jiangjianping/ortp,caizw/ortp,Linphone-sync/oRTP,VTCSecureLLC/ortp,jiangjianping/ortp,Distrotech/oRTP,caizw/ortp,wugh7125/ortp,wugh7125/ortp,caizw/ortp,Distrotech/oRTP,wugh7125/ortp