fixed bugs in post nuke, base.jsp display (simplified it), and global

audit record display

src/com/silverwrist/venice/security/AuditRecord.java

@@ -64,6 +64,8 @@ public class AuditRecord implements AuditData
 
     String getUserName(int uid) throws SQLException, DataException
     {
+      if (uid==0)
+	return "";  // UID 0 = no user
       Integer uid_x = new Integer(uid);
       String rc = (String)(uname_cache.get(uid_x));
       if (rc==null)