Updating to work with java 1.6

Author: sk02241994

src/main/java/org/json/JSONObject.java

@@ -3526,7 +3526,7 @@ public Map create() {
     /**
      * Converts a String to an Enum value.
      */
-    private <E extends Enum<E>> E stringToEnum(Class<E> enumClass, String value) throws JSONException {
+    private <E extends Enum<E>> E stringToEnum(Class<?> enumClass, String value) throws JSONException {
         try {
             @SuppressWarnings("unchecked")
             Method valueOfMethod = enumClass.getMethod("valueOf", String.class);