[PATCH 0/1] MR7513: winewayland: Treat fully transparent cursors as hidden.

[Alexandros Frantzis (＠afrantzis)]

SDL 2.0.18 and newer (including SDL 3) set a fully transparent cursor
object when hiding the cursor (instead of using a NULL cursor handle).
Detect this case and treat it as a request to hide the cursor, to make
our locking/relative-motion heuristics work.

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Here is the SDL code:
https://github.com/libsdl-org/SDL/blob/e20e27e1fbecf8c351b0cc2505567347a3b02...
added in https://github.com/libsdl-org/SDL/commit/8fee82d1fd9d8875cca7f8bfc577c60d12a... to improve RDP support.