asc_setCellBackgroundColor ошибка, если выбрать color none

git-svn-id: svn://192.168.3.15/activex/AVS/Sources/TeamlabOffice/trunk/OfficeWeb@48569 954022d7-b5bf-4e40-9824-e11837661b57

Excel/api.js

@@ -2360,8 +2360,9 @@ var ASC_DOCS_API_USE_EMBEDDED_FONTS = "@@ASC_DOCS_API_USE_EMBEDDED_FONTS";
                     ws.objectRender.controller.setCellBackgroundColor(color);
                 else
                 {
-                    if(color instanceof CAscColor)
+                    if(color instanceof CAscColor || null == color)
                     {
+						if(null != color)
 							color = CorrectAscColor(color);
                         this.wb.getWorksheet().setSelectionInfo("bc", color);
                         this.wb.restoreFocus();