Don't call map_win() in add_win()

Only case where you want to map window in add_win() is during compton
startup, when compton is registering existing windows. Otherwise,
add_win() is always called for newly created windows, so there will
always be a MapNotify coming up for that window. If we map newly created
windows in add_win(), we will try to map it a second time when the MapNotify
arrives.

So, just don't call map_win() from add_win(). For compton startup, we
explicitly call map_win() after calling add_win() in session_init.

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>

src/win.h

@@ -359,6 +359,9 @@ void add_win(session_t *ps, xcb_window_t id, xcb_window_t prev);
 /// Unmap or destroy a window
 void unmap_win(session_t *ps, win **, bool destroy);
 
+void map_win(session_t *ps, win *w);
+void map_win_by_id(session_t *ps, xcb_window_t id);
+
 /**
  * Execute fade callback of a window if fading finished.
  */