PIG-5048: HiveUDTF fail if it is the first expression in projection
PIG-5048: HiveUDTF fail if it is the first expression in projection

git-svn-id: c4d08399a8c07badad33cbf13a0909bacb78f41f@1769006 13f79535-47bb-0310-9956-ffa450edef68

apache/pig,apache/pig,apache/pig,apache/pig,apache/pig,apache/pig,apache/pig