quartz: Use the absolute height of the bitmap format as a negative values simply means it is a top-down bitmap.
diff --git a/dlls/quartz/videorenderer.c b/dlls/quartz/videorenderer.c
index 02fcc7a..eaaada6 100644
--- a/dlls/quartz/videorenderer.c
+++ b/dlls/quartz/videorenderer.c
@@ -318,7 +318,7 @@
This->WindowPos.left = 0;
This->WindowPos.top = 0;
This->WindowPos.right = width;
- This->WindowPos.bottom = height;
+ This->WindowPos.bottom = abs(height);
GetClientRect(This->hWnd, &This->DestRect);
This->init = TRUE;
}