Added scope package

src/build/core/TokenToRegister.go

@@ -16,7 +16,7 @@ func (f *Function) TokenToRegister(t token.Token, register cpu.Register) error {
 	switch t.Kind {
 	case token.Identifier:
 		name := t.Text()
-		variable := f.Variable(name)
+		variable := f.VariableByName(name)
 
 		if variable == nil {
 			return errors.New(&errors.UnknownIdentifier{Name: name}, f.File, t.Position)