Revert "Ticket #140 - incorrect memset parameters"

This reverts commit 2f86ad935e00209a3ea06b9a1463fab575ee89b7.

ldap/servers/slapd/back-ldbm/perfctrs.c

@@ -101,7 +101,7 @@ static void init_shared_memory(perfctrs_private *priv)
 {
 	performance_counters *perf = (performance_counters*)priv->memory;
 	if (NULL != perf) {
-		memset(perf,sizeof(performance_counters),0);
+		memset(perf,0,sizeof(performance_counters));
 	}
 }