From Bertrand: fix a case where on win32 "make install" results in deletion of the just compiled ROOT directory.
From Bertrand:
fix a case where on win32 "make install" results in deletion of the
just compiled ROOT directory.


git-svn-id: ecbadac9c76e8cf640a0bca86f6bd796c98521e3@16728 27541ba8-7e3a-0410-8455-c3a389f83636

bbannier/ROOT,bbannier/ROOT,dawehner/root,dawehner/root,bbannier/ROOT,bbannier/ROOT,dawehner/root,bbannier/ROOT,dawehner/root,dawehner/root,bbannier/ROOT,dawehner/root,dawehner/root,dawehner/root,bbannier/ROOT