Repeat the window mapped check for Ardour

This is probably a better idea than trying to be efficient. If we get
two events in a row, then it can be that the map status has changed
between the two events.

src/wine-host/editor.cpp

@@ -343,26 +343,27 @@ HWND Editor::get_win32_handle() const {
 }
 
 void Editor::handle_x11_events() const {
-    // NOTE: Ardour will unmap the window instead of closing the editor. When
-    //       the window is unmapped, we don't need to handle any X11 events, and
-    //       doing so might even cause X11 errors so we'll abstain from doing
-    //       so. It would be nice if we could stop drawing the GUI when the
-    //       window is unmapped, but filtering Win32 paint messages is probably
-    //       not as easy as it sounds because there's no way to easily link a
-    //       Win32 event to a hidden X11 window.
-    xcb_generic_error_t* error;
-    const xcb_get_window_attributes_cookie_t map_state_cookie =
-        xcb_get_window_attributes(x11_connection.get(), parent_window);
-    xcb_get_window_attributes_reply_t* reply = xcb_get_window_attributes_reply(
-        x11_connection.get(), map_state_cookie, &error);
-    assert(!error);
-
-    const bool window_mapped = reply->map_state == XCB_MAP_STATE_VIEWABLE;
-    free(reply);
-
     xcb_generic_event_t* generic_event;
     while ((generic_event = xcb_poll_for_event(x11_connection.get())) !=
            nullptr) {
+        // NOTE: Ardour will unmap the window instead of closing the editor.
+        //       When the window is unmapped, we don't need to handle any X11
+        //       events, and doing so might even cause X11 errors so we'll
+        //       abstain from doing so. It would be nice if we could stop
+        //       drawing the GUI when the window is unmapped, but filtering
+        //       Win32 paint messages is probably not as easy as it sounds
+        //       because there's no way to easily link a Win32 event to a hidden
+        //       X11 window.
+        xcb_generic_error_t* error;
+        const xcb_get_window_attributes_cookie_t map_state_cookie =
+            xcb_get_window_attributes(x11_connection.get(), parent_window);
+        xcb_get_window_attributes_reply_t* reply =
+            xcb_get_window_attributes_reply(x11_connection.get(),
+                                            map_state_cookie, &error);
+        assert(!error);
+
+        const bool window_mapped = reply->map_state == XCB_MAP_STATE_VIEWABLE;
+        free(reply);
         if (!window_mapped) {
             continue;
         }