fix test compile

Author: cloud-fan

sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/ExpressionEvaluationSuite.scala

@@ -909,7 +909,7 @@ class ExpressionEvaluationSuite extends ExpressionEvaluationBaseSuite {
     checkEvaluation(ArrayOrdinalGetField(BoundReference(4, typeArray, true),
       Literal.create(null, IntegerType)), null, row)
 
-    def quickBuildGetField(expr: Expression, fieldName: String): StructGetField = {
+    def quickBuildGetField(expr: Expression, fieldName: String): GetField = {
       expr.dataType match {
         case StructType(fields) =>
           val field = fields.find(_.name == fieldName).get