workaround some large type name length issues

Signed-off-by: Jason Volk <jason@zemos.net>

src/service/rooms/event_handler/resolve_state.rs

@@ -110,12 +110,14 @@ pub async fn state_resolution<'a, StateSets>(
 where
 	StateSets: Iterator<Item = &'a StateMap<OwnedEventId>> + Clone + Send,
 {
+	let event_fetch = |event_id| self.event_fetch(event_id);
+	let event_exists = |event_id| self.event_exists(event_id);
 	state_res::resolve(
 		room_version,
 		state_sets,
 		auth_chain_sets,
-		&|event_id| self.event_fetch(event_id),
-		&|event_id| self.event_exists(event_id),
+		&event_fetch,
+		&event_exists,
 		automatic_width(),
 	)
 	.map_err(|e| err!(error!("State resolution failed: {e:?}")))