prep for review

Author: andygrove

spark/src/main/scala/org/apache/comet/serde/QueryPlanSerde.scala

@@ -552,6 +552,7 @@ object QueryPlanSerde extends Logging with CometExprShim {
       dt: DataType,
       timeZoneId: Option[String],
       evalMode: CometEvalMode.Value): Option[Expr] = {
+
     val childExpr = exprToProtoInternal(child, inputs, binding)
     if (childExpr.isDefined) {
       val castSupport =
@@ -678,7 +679,7 @@ object QueryPlanSerde extends Logging with CometExprShim {
           CometEvalMode.TRY)
 
       case c @ Cast(child, dt, timeZoneId, _) =>
-        handleCast(c, child, inputs, binding, dt, timeZoneId, evalMode(c))
+        handleCast(expr, child, inputs, binding, dt, timeZoneId, evalMode(c))
 
       case EqualTo(left, right) =>
         createBinaryExpr(