fix typo

Author: aryan1752

js/logo.js

@@ -4,7 +4,7 @@
 //
 // This program is free software; you can redistribute it and/or
 // modify it under the terms of the The GNU Affero General Public
-// License as published by the Free Software Foundatioff; either
+// License as published by the Free Software Foundation; either
 // version 3 of the License, or (at your option) any later version.
 //
 // You should have received a copy of the GNU Affero General Public
@@ -177,7 +177,7 @@ class Logo {
         this.inTempo = false;
         this.inPitchSlider = false;
         this.inMusicKeyboard = false;
-        this._currentDrumlock = null;
+        this._currentDrumBlock = null;
         this.inTimbre = false;
         this.inArpeggio = false;
         this.insideModeWidget = false;