ITS#9146 syncprov: fix sessionlog init

servers/slapd/overlays/syncprov.c

@@ -3079,12 +3079,7 @@ sp_cf_gen(ConfigArgs *c)
 		}
 		sl = si->si_logs;
 		if ( !sl ) {
-			sl = ch_malloc( sizeof( sessionlog ));
-			sl->sl_mincsn = NULL;
-			sl->sl_sids = NULL;
-			sl->sl_num = 0;
-			sl->sl_numcsns = 0;
-			sl->sl_head = sl->sl_tail = NULL;
+			sl = ch_calloc( 1, sizeof( sessionlog ));
 			ldap_pvt_thread_mutex_init( &sl->sl_mutex );
 			si->si_logs = sl;
 		}