Change message on error

Author: jfremy

ReaderPlus/html/background.html

@@ -15,7 +15,7 @@
                     if (request == "getSensibility")
                         sendResponse(settings.get("sensibility"));
                     else
-                        sendResponse(0.4); // snub them.
+                        sendResponse("Failed"); // snub them.
                 });
     </script>
 </head>