Fixed build error

Author: amanomer

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/First.scala

@@ -47,10 +47,10 @@ import org.apache.spark.sql.types._
 case class First(funcName: String, child: Expression, ignoreNullsExpr: Expression)
   extends DeclarativeAggregate with ExpectsInputTypes {
 
-  def this(child: Expression) = this(child, Literal.create(false, BooleanType))
-
   def this(child: Expression, ignoreNullsExpr: Expression) = this("first", child, ignoreNullsExpr)
 
+  def this(child: Expression) = this(child, Literal.create(false, BooleanType))
+
   override def children: Seq[Expression] = child :: ignoreNullsExpr :: Nil
 
   override def nullable: Boolean = true

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Last.scala

@@ -47,10 +47,10 @@ import org.apache.spark.sql.types._
 case class Last(funcName: String, child: Expression, ignoreNullsExpr: Expression)
   extends DeclarativeAggregate with ExpectsInputTypes {
 
-  def this(child: Expression) = this(child, Literal.create(false, BooleanType))
-
   def this(child: Expression, ignoreNullsExpr: Expression) = this("last", child, ignoreNullsExpr)
 
+  def this(child: Expression) = this(child, Literal.create(false, BooleanType))
+
   override def children: Seq[Expression] = child :: ignoreNullsExpr :: Nil
 
   override def nullable: Boolean = true