Fixed global scope leaks in Base58.

Author: justmoon

src/base58.js

@@ -29,8 +29,7 @@
  } else break;
  }
 
- s = chars.join('');
- return s;
+ return chars.join('');
  },
 
  /**
@@ -42,7 +41,7 @@
  * Ported to JavaScript by Stefan Thomas.
  */
  decode: function (input) {
- bi = BigInteger.valueOf(0);
+ var bi = BigInteger.valueOf(0);
  var leadingZerosNum = 0;
  for (var i = input.length - 1; i >= 0; i--) {
  var alphaIndex = B58.alphabet.indexOf(input[i]);

src/opcode.js

@@ -143,7 +143,7 @@
  // template matching params
  OP_PUBKEYHASH : 253,
  OP_PUBKEY : 254,
- OP_INVALIDOPCODE : 255,
+ OP_INVALIDOPCODE : 255
  };
 
  Opcode.reverseMap = [];