[Bug 46863] If prefix contains "windows" drive information not available in 64-bit prefix

https://bugs.winehq.org/show_bug.cgi?id=46863

--- Comment #5 from Zebediah Figura  ---
(In reply to Fabian Maurer from comment #4)
> @Zebediah Figura
> Do you know why it's checking for the string windows in the first place?

The point of that function is twofold, both to determine the correct case of
each path element and to resolve redirects. Since determining the correct case
can be expensive, it tries to use the passed-in case first. However, if the
path involves redirects, that check will be wrong, so it's skipped. As it
happens all redirected files and directories live inside the C:/windows/
directory, so it works as a quick filter.