Couple of minor issues fixed

* CALLVALUE pushed incorrect value to the stack
* Set execution model to closure

ethstate/state.go

@@ -94,11 +94,15 @@ func (self *State) GetStateObject(addr []byte) *StateObject {
 	}
 
 	stateObject = NewStateObjectFromBytes(addr, []byte(data))
-	self.stateObjects[string(addr)] = stateObject
+	self.SetStateObject(stateObject)
 
 	return stateObject
 }
 
+func (self *State) SetStateObject(object *StateObject) {
+	self.stateObjects[string(object.address)] = object
+}
+
 // Retrieve a state object or create a new state object if nil
 func (self *State) GetOrNewStateObject(addr []byte) *StateObject {
 	stateObject := self.GetStateObject(addr)