check row fields

cell/model/PivotTables.js

@@ -2727,6 +2727,7 @@ CT_pivotTableDefinition.prototype.updatePivotType = function () {
 	var field;
 	var pivotFields = this.asc_getPivotFields();
 	var rowFields = this.asc_getRowFields();
+	if (rowFields) {
 		for (var i = 0; i < rowFields.length; ++i) {
 			field = pivotFields[rowFields[i].asc_getIndex()];
 			if (false !== field.outline) {
@@ -2734,6 +2735,7 @@ CT_pivotTableDefinition.prototype.updatePivotType = function () {
 				break;
 			}
 		}
+	}
 };
 CT_pivotTableDefinition.prototype.intersection = function (range) {
 	return (this.location && this.location.intersection(range)) || this.pageFieldsIntersection(range);