fix '=Sheet1:Sheet2!A1' formula error

cell/model/FormulaObjects/parserFormula.js

@@ -1295,7 +1295,13 @@ cArea3D.prototype.getWS = function () {
 		return range ? range.getBBox0() : range;
 	};
 	cArea3D.prototype.isValid = function () {
-		return !!this.getRanges();
+		var r = this.getRanges();
+		for (var i = 0; i < r.length; ++i) {
+			if (!r) {
+				return false;
+			}
+		}
+		return true;
 	};
 	cArea3D.prototype.countCells = function () {
 		var _wsA = this.wsRange();

cell/model/Workbook.js

@@ -5518,9 +5518,7 @@ Woorksheet.prototype._RecalculatedFunctions=function(cell,bad,setCellFormat){
             for ( var i = 0, length = c.formulaParsed.outStack.length; i < length; i++ ) {
                 elem = c.formulaParsed.outStack[i];
                 if ( elem instanceof AscCommonExcel.cRef || elem instanceof cRef3D || elem instanceof AscCommonExcel.cArea || elem instanceof cArea3D ) {
-                    var r = elem.getRanges();
-                    if ( elem instanceof cArea3D && r.length > 0 )
-                        r = r[0];
+                    var r = elem.getRange();
                     if ( r && r.getNumFormatStr ) {
                         var sCurFormat = c.getNumFormatStr();
                         if ( g_oDefaultFormat.Num.getFormat() == sCurFormat ) {