fix FeedIntakeOperatorNodePushable: an IOperatorNodePushable instance can only be closed *once*

git-svn-id: https://asterixdb.googlecode.com/svn/branches/asterix_stabilization@1275 eaa15691-b419-025a-1212-ee371bd00084
diff --git a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/data/operator/FeedIntakeOperatorNodePushable.java b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/data/operator/FeedIntakeOperatorNodePushable.java
index 29fe72a..d0dbb98 100644
--- a/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/data/operator/FeedIntakeOperatorNodePushable.java
+++ b/asterix-external-data/src/main/java/edu/uci/ics/asterix/external/data/operator/FeedIntakeOperatorNodePushable.java
@@ -81,7 +81,7 @@
 
     @Override
     public void close() throws HyracksDataException {
-        writer.close();
+        
     }
 
     @Override