manually apply patch from stleary@5a4fb65#diff-0

ansell · ansell · commit 440c672cbcec · 2011-08-30T00:30:52.000+10:00
diff --git a/JSONArray.java b/JSONArray.java
@@ -78,7 +78,7 @@ of this software and associated documentation files (the "Software"), to deal
  * </ul>
 
  * @author JSON.org
- * @version 2011-05-04
+ * @version 2011-08-25
  */
 public class JSONArray {
 
@@ -554,7 +554,7 @@ public String optString(int index) {
      */
     public String optString(int index, String defaultValue) {
         Object object = opt(index);
-        return object != null ? object.toString() : defaultValue;
+        return JSONObject.NULL.equals(object) ? object.toString() : defaultValue;
     }
 
 
