Fix possible javascript error on drag-n-drop (#1489560)

Aleksander Machniak

2014-02-05 c83a9556e75c8f98cb94ff5f4c3656b773975f02

 program/js/editor.js

@@ -61,6 +61,9 @@
        if (!active)
          rcmail.spellcheck_state();
      });
      ed.onKeyPress.add(function(ed, e) {
          rcmail.compose_type_activity++;
      });
    }
  }