NPE in UIData

[Jon Travis]

There is an NPE condition in UIData.

setValue() sets _rowStates = null

Nowhere else can _rowStates be set back to something meaningful, and
when it is referenced in places like encodeBegin(), you'll get an NPE.

Patch at the end.

-- Jon


Index: api/src/java/javax/faces/component/UIData.java
===================================================================
--- api/src/java/javax/faces/component/UIData.java  (revision 233275)
+++ api/src/java/javax/faces/component/UIData.java  (working copy)
@@ -664,7 +664,7 @@
     {
         _value = value;
         _dataModelMap.clear();
-        _rowStates = null;
+        _rowStates.clear();
         _isValidChilds = true;
     }