Charge extra sload (#1442)

Author: vanja-vechain

builtin/staker_native.go

@@ -442,6 +442,7 @@ func init() {
 			charger := gascharger.New(env)
 
 			staker := Staker.NativeMetered(env.State(), charger)
+			charger.Charge(thor.SloadGas)
 			issuance, err := Energy.Native(env.State(), env.BlockContext().Time).CalculateRewards(staker)
 			if err != nil {
 				return nil, err

builtin/staker_native_gas_test.go

@@ -236,7 +236,7 @@ func TestStakerNativeGasCosts(t *testing.T) {
 		},
 		{
 			function:    "native_issuance",
-			expectedGas: 200,
+			expectedGas: 400,
 			description: "Get issuance for the current block",
 		},
 	}