f add another missing lock

Author: TheBlueMatt

lightning/src/ln/channelmanager.rs

@@ -7682,6 +7682,8 @@ where
 			.absolute_expiry(absolute_expiry)
 			.path(path);
 
+		let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
+
 		let expiration = StaleExpiration::AbsoluteTimeout(absolute_expiry);
 		self.pending_outbound_payments
 			.add_new_awaiting_invoice(