take LeaseSet from GarlicDestination

RouterContext.h

@@ -42,6 +42,9 @@ namespace i2p
 			const uint8_t * GetEncryptionPublicKey () const { return GetIdentity ().GetStandardIdentity ().publicKey; };
 			void SetLeaseSetUpdated () {};
 			void HandleDataMessage (const uint8_t * buf, size_t len) {};
+
+			// implements GarlicDestination
+			const i2p::data::LeaseSet * GetLeaseSet () { return nullptr; };
 			
 		private: