(svn_fs_open_txn): New func, implements api seen in svn_fs.h (txn_body_begin_txn, svn_fs_begin_txn, svn_fs_close_txn): Return SVN_NO_ERROR instead of plain 0.
(svn_fs_open_txn): New func, implements api seen in svn_fs.h
(txn_body_begin_txn, svn_fs_begin_txn, svn_fs_close_txn):
Return SVN_NO_ERROR instead of plain 0.

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