ITS#8038 free presentlist at end of refresh

servers/slapd/syncrepl.c

@@ -1352,6 +1352,10 @@ do_syncrep2(
 					{
 						rc = syncrepl_updateCookie( si, op, &syncCookie);
 					}
+					if ( si->si_presentlist ) {
+						avl_free( si->si_presentlist, ch_free );
+						si->si_presentlist = NULL;
+					}
 				} 
 
 				ldap_memfree( retoid );