followup to d66b94b in case no arguments are present

Author: ylafon

org/w3c/css/css/CssValidator.java

@@ -95,6 +95,10 @@ public static void main(String args[])
 
         // first, we get the parameters and create an application context
         try {
+            // kludge to display usage
+            if (args == null || args.length == 0) {
+                throw new Exception();
+            }
             for (String param : args) {
                 if ("-h".equals(param) || "--help".equals(param) || "-help".equals(param)) {
                     throw new Exception();