Do not save Var.Time to the database.

persist.go

@@ -28,6 +28,10 @@ type Var struct {
 	opt Option
 }
 
+type encVar struct {
+	X interface{}
+}
+
 type Option struct {
 	Permanent bool
 }
@@ -224,12 +228,13 @@ type encoded struct {
 
 func encode(p *Var,chs ...chan struct{}) encoded {
 	ret := encoded{name:[]byte(p.name)}
+	ep := encVar{ p.X }
 	if len(chs) > 0 {
 		ret.donech = chs[0]
 	}
 	var buf bytes.Buffer
 	enc := gob.NewEncoder(&buf)
-	err := enc.Encode(*p)
+	err := enc.Encode(ep)
 	if err != nil {
 		fmt.Println("encode(): ",err)
 	}