I do not believe this is the correct place to make this change. Inheritance still needs to occur even when SetSecurityInfo is not used, which pretty much means it has to be within the wineserver itself so that the same code can be used for CreateFile. The code I put together for this (as written it is somewhat dependent on my other ACL code) can be found here: https://github.com/wine-compholio/wine-staging/tree/master/patches/server-In...
The first patch is for CreateFile and the second one is for SetSecurityInfo. I'm happy to try and change this to help you solve your problem without my other ACL code, it's been on my TODO list anyway - I've just been too busy with work lately :/
Best, Erich