Client: Reset wl_egl_window before wl_surface

Semantically we want things in this order as wl_egl_window_create takes
a reference to the wl_surface. Teardown typically is the opposite of
construction.

This brings us in line with GTK which also tears down in this order.

This fixes a repeatable crash when using Nvidia's EGLStreams and closing
a window.

Change-Id: I356dfbba9a7315717c8ecdc7023ca7b047622697
Reviewed-by: Frederik Gladhorn <gladhorn@kde.org>
Reviewed-by: Johan Helsing <johanhelsing@gmail.com>

src/plugins/platforms/wayland/qwaylandwindow.cpp

@@ -244,6 +244,8 @@ void QWaylandWindow::reset(bool sendDestroyEvent)
     mShellSurface = nullptr;
     delete mSubSurfaceWindow;
     mSubSurfaceWindow = nullptr;
+
+    invalidateSurface();
     if (mSurface) {
         emit wlSurfaceDestroyed();
         QWriteLocker lock(&mSurfaceLock);