Don't fetch the root window early

Wine is weird. The whole reason why we're doing these weird things is
because Wine somehow tries to delete the window twice. If we don't call
`xcb_query_tree()` here (and get an error back), then we're back at the
error we tried to solve. Apparently this works, and given that noone
dares touching Wine's X11drv code I won't ask any further questions.

src/wine-host/editor.cpp

@@ -174,12 +174,10 @@ ATOM get_window_class() noexcept;
 DeferredWin32Window::DeferredWin32Window(
     MainContext& main_context,
     std::shared_ptr<xcb_connection_t> x11_connection,
-    HWND window)
+    HWND window) noexcept
     : handle(window),
       main_context(main_context),
-      x11_connection(x11_connection),
-      wine_window(get_x11_handle(handle)),
-      root_window(get_root_window(*x11_connection, wine_window)) {}
+      x11_connection(x11_connection) {}
 
 DeferredWin32Window::~DeferredWin32Window() noexcept {
     // NOTE: For some rason, Wine will sometimes try to delete a window twice if
@@ -188,7 +186,16 @@ DeferredWin32Window::~DeferredWin32Window() noexcept {
     //       iZotope Rx plugins. In Renoise this would otherwise trigger an X11
     //       error every time you close such a plugin's editor, and in other
     //       DAWs I've also seen it happen from time to time.
-    xcb_reparent_window(x11_connection.get(), wine_window, root_window, 0, 0);
+    try {
+        const xcb_window_t wine_window = get_x11_handle(handle);
+        const xcb_window_t root_window =
+            get_root_window(*x11_connection, wine_window);
+        xcb_reparent_window(x11_connection.get(), wine_window, root_window, 0,
+                            0);
+    } catch (const std::runtime_error& error) {
+        // If we can't reparent the window (or, well, fetch the root window),
+        // then that's not a big deal here
+    }
 
     // XXX: We are already deferring this closing by posting `WM_CLOSE` to the
     //      message loop instead of calling `DestroyWindow()` ourselves, but we

src/wine-host/editor.h

@@ -102,7 +102,7 @@ class DeferredWin32Window {
      */
     DeferredWin32Window(MainContext& main_context,
                         std::shared_ptr<xcb_connection_t> x11_connection,
-                        HWND window);
+                        HWND window) noexcept;
 
     /**
      * Post a `WM_CLOSE` message to the `handle`'s message queue as described
@@ -115,9 +115,6 @@ class DeferredWin32Window {
    private:
     MainContext& main_context;
     std::shared_ptr<xcb_connection_t> x11_connection;
-
-    const xcb_window_t wine_window;
-    const xcb_window_t root_window;
 };
 
 /**