Clean up the tree before configuring the Win32 build.

git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@2861 92316355-f0b4-4df1-b90c-862c8a59935f

build-win32

@@ -16,6 +16,8 @@ rm -f "${INSTALLDIR}.zip"
 mkdir "${INSTALLDIR}"
 mkdir "${BUILDDIR}"
 
+make distclean || true
+
 cd "${BUILDDIR}"
 # Build for win32
 "${SRCDIR}/configure" --host=i586-mingw32msvc --prefix=/ --bindir=/bin --libdir=/lib --disable-imlib2 --disable-doc