* fetch.c (everywhere): Use SVN_NO_ERROR for 'no error', rather than NULL (for readability and consistency).
* fetch.c (everywhere): Use SVN_NO_ERROR for 'no error', rather than
NULL (for readability and consistency).

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