[PATCH v4 0/2] MR8702: user32/tests: Add more SendMessageCallbackA/W() tests with NULL callback.

[Zhiyi Zhang (＠zhiyi)]

For React Native.

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  v4: win32u: Put the message in the queue when the callback pointer is NULL and the callback data is 1.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/8702