Followup to r29136: Chain errors properly, just like they were in r29127.
Followup to r29136: Chain errors properly, just like they were in r29127.

* subversion/libsvn_subr/opt.c
  (svn_opt_args_to_target_array3): Chain successive errors together.

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