fix address

src/solidity/types/Address.js

 'use strict'
 var util = require('./util')
-var utileth = require('ethereumjs-util')
 
 function Address () {
   this.storageSlots = 1
@@ -10,7 +9,7 @@ function Address () {
 
 Address.prototype.decodeFromStorage = function (location, storageContent) {
   var value = util.extractHexByte(location, storageContent, this.storageBytes)
-  return '0x' + utileth.unpad(value).toUpperCase()
+  return '0x' + value.toUpperCase()
 }
 
 module.exports = Address

test/solidity/storageDecoder.js

@@ -100,7 +100,7 @@ function testByteStorage (st) {
 
   decoded = stateDecoder.solidityState({}, output.sources, 'byteStorage')
   st.equal(decoded['b1'], false)
-  st.equal(decoded['a1'], '0x')
+  st.equal(decoded['a1'], '0x0000000000000000000000000000000000000000')
   st.equal(decoded['b2'], false)
   st.equal(decoded['dynb1'], '0x')
   st.equal(decoded['stab'], '0x')