fix decode add, int, uint

src/solidity/types/Address.js

@@ -13,7 +13,7 @@ Address.prototype.decodeFromStorage = function (location, storageContent) {
 }
 
 Address.prototype.decodeLocals = function (stackHeight, stack, memory) {
-  if (stack.length < stackHeight) {
+  if (stack.length - 1 < stackHeight) {
     return '0x0000000000000000000000000000000000000000'
   } else {
     return '0x' + util.extractHexByteSlice(stack[stack.length - 1 - stackHeight], this.storageBytes, 0)

src/solidity/types/Int.js

@@ -12,7 +12,7 @@ Int.prototype.decodeFromStorage = function (location, storageContent) {
 }
 
 Int.prototype.decodeLocals = function (stackHeight, stack, memory) {
-  if (stack.length < stackHeight) {
+  if (stack.length - 1 < stackHeight) {
     return '0'
   } else {
     return util.decodeIntFromHex(stack[stack.length - 1 - stackHeight].replace('0x', ''), 32, true)

src/solidity/types/Uint.js

@@ -12,7 +12,7 @@ Uint.prototype.decodeFromStorage = function (location, storageContent) {
 }
 
 Uint.prototype.decodeLocals = function (stackHeight, stack, memory) {
-  if (stack.length < stackHeight) {
+  if (stack.length - 1 < stackHeight) {
     return '0'
   } else {
     return util.decodeIntFromHex(stack[stack.length - 1 - stackHeight].replace('0x', ''), this.storageBytes, false)