fix deleting from queue when only two elements

if you have only two songs in the queue right now, and you try to delete
the second song, it deletes the first song instead.

src/event/handler.rs

@@ -159,13 +159,20 @@ pub fn handle_key_events(key_event: KeyEvent, app: &mut App) -> AppResult<()> {
 
                     // Delete highlighted song from the queue
                     KeyCode::Char('d') => {
-                        if app.queue_list.index >= app.queue_list.list.len() - 1
+                        if app.queue_list.index >= app.queue_list.list.len()
                             && app.queue_list.index != 0
                         {
                             app.queue_list.index -= 1;
                         }
 
                         app.conn.conn.delete(app.queue_list.index as u32)?;
+
+                        if app.queue_list.index >= app.queue_list.list.len().saturating_sub(1)
+                            && app.queue_list.index != 0
+                        {
+                            app.queue_list.index -= 1;
+                        }
+
                         app.update_queue();
                     }