Fix from Philippe. This makes sure that CopyTree does not operate on a left over from a Draw command.  Before this patch doing:         mytree->Draw("fPx","fPx>10);         mytree->CopyTree(""); was the SAME as         mytree->CopyTree("fPx>10");
Fix from Philippe.
This makes sure that CopyTree does not operate on a left over
from a Draw command.  Before this patch doing:
        mytree->Draw("fPx","fPx>10);
        mytree->CopyTree("");
was the SAME as
        mytree->CopyTree("fPx>10");


git-svn-id: ecbadac9c76e8cf640a0bca86f6bd796c98521e3@3100 27541ba8-7e3a-0410-8455-c3a389f83636

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