erp5_officejs: extra controls in appcachestorage sync error handling

bt5/erp5_officejs/PathTemplateItem/web_page_module/gadget_officejs_jio_js.js

@@ -171,7 +171,7 @@
                       });
                   }, function (error) {
                   console.log("Error while appcache-local storage synchronization");
-                  if (error.currentTarget.status == "401") {
+                  if (error && error.currentTarget && error.currentTarget.status == "401") {
                     console.log("Unauthorized access to storage, sync cancelled");
                     return;
                   }

bt5/erp5_officejs/PathTemplateItem/web_page_module/gadget_officejs_jio_js.xml

@@ -234,7 +234,7 @@
             </item>
             <item>
                 <key> <string>serial</string> </key>
-                <value> <string>974.29947.29457.36147</string> </value>
+                <value> <string>974.29979.40844.25856</string> </value>
             </item>
             <item>
                 <key> <string>state</string> </key>
@@ -252,7 +252,7 @@
                     </tuple>
                     <state>
                       <tuple>
-                        <float>1553007300.28</float>
+                        <float>1553009106.08</float>
                         <string>UTC</string>
                       </tuple>
                     </state>