src: matrix: Use unwrap_or_default()

src/matrix.rs

@@ -93,7 +93,7 @@ async fn send_to_room(
             let res = room.send(RoomMessageEventContent::text_html(msg.clone(), msg)).await?;
 
             debug!("Retrieving list of pinned events");
-            let mut old_pinned_eids = room.pinned_event_ids().unwrap_or(Vec::new());
+            let mut old_pinned_eids = room.pinned_event_ids().unwrap_or_default();
             let mut new_pinned_eids = Vec::with_capacity(old_pinned_eids.len());
 
             for eid in old_pinned_eids.drain(..) {