Fix call to globpath() for Vim 7.2 and below.
Fix call to globpath() for Vim 7.2 and below.

globpath() takes an extra optional parameter in Vim 7.3, but this
breaks NERD tree on earlier versions.

iff/dotfiles-old,nywilken/dotfiles,iff/dotfiles-old,tschundler/dotfiles,nywilken/dotfiles,tschundler/dotfiles,tschundler/dotfiles