fixed unittest build problem

cmd/geth/js_test.go

@@ -105,7 +105,7 @@ func testJEthRE(t *testing.T) (string, *testjethre, *eth.Ethereum) {
 		t.Errorf("Error creating DocServer: %v", err)
 	}
 	tf := &testjethre{ds: ds, stateDb: ethereum.ChainManager().State().Copy()}
-	repl := newJSRE(ethereum, assetPath, "", false, tf)
+	repl := newJSRE(ethereum, assetPath, "", "", false, tf)
 	tf.jsre = repl
 	return tmp, tf, ethereum
 }