Merge #74: docode function has no enc as a parameter

8e5e043 docode function has no enc as a parameter (Alphons van der Heijden)

Pull request description:

ACKs for top commit:
  sipa:
    utACK 8e5e043

Tree-SHA512: d0ac8b8c85b62e2c2c87605e8c361d3735b0715611919cc82f88ce65b56a82b4008106dd22bf82052dfd3180861475629de095039fc28034186ba2269df64800

ref/javascript/segwit_addr.js

@@ -84,7 +84,7 @@ function encode (hrp, version, program) {
     enc = bech32.encodings.BECH32M;
   }
   var ret = bech32.encode(hrp, [version].concat(convertbits(program, 8, 5, true)), enc);
-  if (decode(hrp, ret, enc) === null) {
+  if (decode(hrp, ret) === null) {
     return null;
   }
   return ret;