Updated vm

utils/vm_env.go

@@ -33,3 +33,4 @@ func (self *VMEnv) Difficulty() *big.Int   { return self.block.Difficulty }
 func (self *VMEnv) BlockHash() []byte      { return self.block.Hash() }
 func (self *VMEnv) Value() *big.Int        { return self.value }
 func (self *VMEnv) State() *ethstate.State { return self.state }
+func (self *VMEnv) GasLimit() *big.Int     { return self.block.GasLimit }