Fixed an emacs21.3 compatibility bug
Fixed an emacs21.3 compatibility bug

* trunk/contrib/client-side/emacs/psvn.el:
  (svn-substring-no-properties): Ensure that the from parameter
    is given when calling substring


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@874514 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion