Fix Clirr error wrt return type of Option#clone().

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/cli/trunk@1439565 13f79535-47bb-0310-9956-ffa450edef68

Author: netomi

src/main/java/org/apache/commons/cli/DefaultParser.java

@@ -599,7 +599,7 @@ private void handleOption(Option option) throws ParseException
         // check the previous option before handling the next one
         checkRequiredArgs();
 
-        option = option.clone();
+        option = (Option) option.clone();
 
         updateRequiredOptions(option);
 

src/main/java/org/apache/commons/cli/Option.java

@@ -631,9 +631,11 @@ public int hashCode()
      * After calling this method, it is very likely you will want to call 
      * clearValues(). 
      *
-     * @throws RuntimeException
+     * @return a clone of this Option instance
+     * @throws RuntimeException if a {@link CloneNotSupportedException} has been thrown
+     * by {@link super#clone()}
      */
-    public Option clone()
+    public Object clone()
     {
         try
         {

src/main/java/org/apache/commons/cli/Parser.java

@@ -380,7 +380,7 @@ protected void processOption(String arg, ListIterator<String> iter) throws Parse
         }
 
         // get the option represented by arg
-        Option opt = getOptions().getOption(arg).clone();
+        Option opt = (Option) getOptions().getOption(arg).clone();
 
         // update the required options and groups
         updateRequiredOptions(opt);