[Bug 47386] Drakensang Online incorrectly renders the cursor

https://bugs.winehq.org/show_bug.cgi?id=47386

--- Comment #7 from Zebediah Figura  ---
With https://source.winehq.org/patches/data/167302 this is improved; i.e. the
cursor actually moves. However, it flickers badly for me. I think this is
because the applications is repeatedly (once per WM_SETCURSOR message? I didn't
check) calling SetCursorProperties() with the same properties, and we destroy
and recreate the cursor each time.

I think the right thing to do is to check if the cursor texture and hotspot are
the same, and skip setting it if so, but wined3d_device_set_cursor_properties()
contains a warning not to hold a reference to the cursor texture, for fear of
creating a circular reference. That warning dates back to 2006 (65e5ed60ae02),
though, so I'm not sure if it's still salient. D3D refcounting is not exactly
trivial...