Serialize and deserialize vcs in JS
diff --git a/public/js/src/hint.js b/public/js/src/hint.js
index 3c2e3ca..966cc78 100644
--- a/public/js/src/hint.js
+++ b/public/js/src/hint.js
@@ -39,7 +39,7 @@
   };
 
   // Default log message
-  KorAP.log = function (type, msg) {
+  KorAP.log = KorAP.log || function (type, msg) {
     console.log(type + ": " + msg);
   };