Fix: improper call to base64url.decode (fixes #80)

Author: linuxwolf

lib/jwe/decrypt.js

@@ -96,7 +96,7 @@ function JWEDecrypter(ks, globalOpts) {
           protect;
       promise = promise.then(function(rcptList) {
         if (input.protected) {
-          protect = base64url.decode(input.protected, "utf8");
+          protect = base64url.decode(input.protected).toString("utf8");
           protect = JSON.parse(protect);
 
           // verify "crit" field first