Fix a segfault for consumers of svn_client_copy4() and svn_client_move5(), who don't request commit info.
Fix a segfault for consumers of svn_client_copy4() and svn_client_move5(), who
don't request commit info.

Suggested by: djames

* subversion/libsvn_client/copy.c
  (svn_client_copy4, svn_client_move5): Ensure that commit_info_p is not NULL
  before attempting to set it.

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