The _S_IFBLK macro, used to identify block special files in file systems, is
being updated from 0x3000 to 0x6000. This change aligns mingw-w64 with the more
commonly used value across Unix-like systems and other C libraries.
The old value of 0x3000 may have caused compatibility issues when working
[1] describes PathQuoteSpacesA with return type bool and
[2] describes PathQuoteSpacesW with return type bool.
Both functions are currently declared with return type void in shlwapi.h.
Fix this by using LWSTDAPI_(WINBOOL) as return type similar to the other
functions in that header.
This fixes b