Apply Wine commit "wpp: Fix path separator on Windows platforms." by Hermès Bélusca-Maïto (9dbd1969fca9c31155c6d85ea8129d249467926b)
Indeed, Windows systems use ':' as part of paths and therefore, use another separator character.
This enables compiling ReactOS from source files located in a different disk partition as the generated (output) files.
CORE-6442 #resolve #comment Committed in r58044.
svn path=/trunk/; revision=58044
Alexandre Julliard <julliard@winehq.org>
- Default search path for an include file should be based on the path of
the parent source file, not the current directory.
svn path=/trunk/; revision=18788
