Silence warnings on decltype() with Wine 5.22

There were already similar warnings on 32-bit winegcc, but now it also
happens on the 64-bit version. Instead of adding
`-Wno-ignored-attributes` we'll just sprinkle some warning ignores here
and there to prevent any other surprises.

src/wine-host/editor.h

@@ -197,6 +197,10 @@ class Editor {
      */
     const WindowClass window_class;
 
+    // FIXME: This emits `-Wignored-attributes` as of Wine 5.22
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wignored-attributes"
+
     /**
      * The handle for the window created through Wine that the plugin uses to
      * embed itself in.
@@ -216,6 +220,8 @@ class Editor {
         std::unique_ptr<std::remove_pointer_t<HWND>, decltype(&DestroyWindow)>>
         win32_child_handle;
 
+#pragma GCC diagnostic pop
+
     /**
      * The Win32 API will block the `DispatchMessage` call when opening e.g. a
      * dropdown, but it will still allow timers to be run so the GUI can still