don't crash on os x when no lease set found for udp tunnel
don't crash on os x when no lease set found for udp tunnel

brain5lug/i2pd,brain5lug/i2pd,PurpleI2P/i2pd,majestrate/i2pd,PurpleI2P/i2pd,majestrate/i2pd,hypnosis-i2p/i2pd,PurpleI2P/i2pd,hypnosis-i2p/i2pd,hypnosis-i2p/i2pd,PurpleI2P/i2pd,majestrate/i2pd,majestrate/i2pd,majestrate/i2pd,brain5lug/i2pd,brain5lug/i2pd,hypnosis-i2p/i2pd,hypnosis-i2p/i2pd