This is a test and fix for an edge case in the rebar component where `cyChild` is set to a larger value than `cyMaxChild` while `cyIntegral` is exactly 0 on a VARIABLEHEIGHT rebar. On Windows, at least the two Win11 machines I have acces to, the WinAPI seems to clamp the value to `cyMaxChild` so the test passes. On Wine, it does not clamp the value and the test fails, but passes with the fix. Specifically, Wine's behaviour results in the program EffectsEd3 from the modding tools of Call of Duty: World at War sizing its rebar height incorrectly, taking over the whole window and making the program unusable. With the fix, this is no longer the case and the program becomes usable. {width=255 height=189} - {width=351 height=185} -- https://gitlab.winehq.org/wine/wine/-/merge_requests/10809