Better logging if we trigger the doc emptystring issue

www/common/sframe-app-framework.js

@@ -259,6 +259,8 @@ define([
                     // We're getting 'new pad' but there is an existing file
                     // We don't know exactly why this can happen but under no circumstances
                     // should we overwrite the content, so lets just try again.
+                    console.log("userDoc is '' but this is not a new pad, something is " +
+                        "terribly wrong, reloading.");
                     common.gotoURL();
                     return;
                 }