Added call registers

src/build/VariableDefinition.go

@@ -29,12 +29,12 @@ func (f *Function) CompileVariableDefinition(expr *expression.Expression) error
 		return err
 	}
 
-	f.CPU.Use(reg)
-
-	f.Variables[name] = &Variable{
+	variable := &Variable{
 		Name:     name,
 		Register: reg,
 	}
 
+	f.Variables[name] = variable
+	f.CPU.Use(reg)
 	return nil
 }