[PATCH v4 1/2] strmbase: Detach the window from the parent before destroying it.

[Zebediah Figura]

From: Gabriel Ivăncescu

This fixes a regression introduced by 3b5198c8283d891095612c1001edb5e5788d6059.

Signed-off-by: Gabriel Ivăncescu 
Signed-off-by: Zebediah Figura 
---
Resent with minor changes in style and wording.

dlls/strmbase/window.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/dlls/strmbase/window.c b/dlls/strmbase/window.c
index 07a12eca26..71bbf73ccc 100644
--- a/dlls/strmbase/window.c
+++ b/dlls/strmbase/window.c
@@ -136,9 +136,15 @@ HRESULT WINAPI BaseWindowImpl_PrepareWindow(BaseWindow *This)

HRESULT WINAPI BaseWindowImpl_DoneWithWindow(BaseWindow *This)
 {
+    BaseControlWindow *window = impl_from_BaseWindow(This);
+
     if (!This->hWnd)
         return S_OK;

+    /* Media Player Classic deadlocks if WM_PARENTNOTIFY is sent, so unparent
+     * the window first. */
+    IVideoWindow_put_Owner(&window->IVideoWindow_iface, (OAHWND)NULL);
+
     SendMessageW(This->hWnd, WM_CLOSE, 0, 0);
     This->hWnd = NULL;