HIVE-6389 : LazyBinaryColumnarSerDe-based RCFile tables break when looking up elements in null-maps. (Mithun Radhakrishnan via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1573644 13f79535-47bb-0310-9956-ffa450edef68