[Bug 38114] Steam doesn't allow to install games in different locations (needs GetVolumePathName implementation)

https://bugs.winehq.org/show_bug.cgi?id=38114

--- Comment #17 from Rosanne DiMesio  ---
One minor problem I encountered with the patch is that it adds drive letters D
through H to the list of drives available to install to from the
Settings>Downloads>Steam Library Folders>Add Folders dialog, even though I
haven't mapped any such drives in winecfg. It won't actually let me create a
folder in any of those phantom drives, and having them listed there does force
me to scroll down to find Z: (which is mapped by default in and does appear to
work as expected in the dialog).