(svn_fs__dag_get_proplist): use NULL explicitly, rather than   'proplist' for a bit more clarity about what is happening.
(svn_fs__dag_get_proplist): use NULL explicitly, rather than
  'proplist' for a bit more clarity about what is happening.

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@841991 13f79535-47bb-0310-9956-ffa450edef68

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