Followup to r34205.
Followup to r34205.

* subversion/libsvn_subr/error.c
  (svn_error_compose_create): Simplify, simplify...

Suggested by: gstein

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion