syntax error fix

js/mods.js

@@ -1296,7 +1296,7 @@ function edit_module(evt) {
       update_module(idnumber)
       win.close()
       }
-   if (filename != "undefined" && != "") {
+   if (filename != "undefined" && filename != "") {
       var btn = document.createElement('button')
          btn.appendChild(document.createTextNode('reload from server'))
          btn.style.padding = mods.ui.padding