* subversion/libsvn_client/commit.c   (svn_client_commit): Prevent an unnecessary network round-trip by     only requesting the HEAD revision if we really need to know it.
* subversion/libsvn_client/commit.c
  (svn_client_commit): Prevent an unnecessary network round-trip by
    only requesting the HEAD revision if we really need to know it.

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@844067 13f79535-47bb-0310-9956-ffa450edef68

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