Followup to r34206.
Followup to r34206.

* subversion/libsvn_subr/subst.c
  (svn_subst_copy_and_translate3): Just return the composed error
    chain as soon as you know it's non-NULL, rather than testing it
    again later.

Suggested by: gstein


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@874281 13f79535-47bb-0310-9956-ffa450edef68

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