На _prepareCellStyle если не нашли возвращаем default

git-svn-id: svn://192.168.3.15/activex/AVS/Sources/TeamlabOffice/trunk/OfficeWeb@57211 954022d7-b5bf-4e40-9824-e11837661b57

Excel/model/Workbook.js

@@ -4153,7 +4153,7 @@ Cell.prototype.setValueCleanFormula = function (array) {
 
     wb.needRecalc.nodes[getVertexId(sheetId, cellId)] = [sheetId, cellId];
     wb.needRecalc.length++;
-}
+};
 Cell.prototype.setType=function(type){
 	return this.oValue.type = type;
 };

Excel/model/WorkbookElems.js

@@ -1415,7 +1415,7 @@ CCellStyles.prototype = {
 			this.CustomStyles[i].XfId = ++maxXfId;
 			return this.CustomStyles[i].XfId;
 		}
-		return null;
+		return g_oDefaultXfId;
 	}
 };
 /** @constructor */