Fix possible panics

Author: Rikkuru

commands/subscribe.go

@@ -22,7 +22,7 @@ func (cmd *Subscribe) Command() *imap.Command {
 }
 
 func (cmd *Subscribe) Parse(fields []interface{}) error {
-	if len(fields) < 0 {
+	if len(fields) < 1 {
 		return errors.New("No enough arguments")
 	}
 
@@ -50,7 +50,7 @@ func (cmd *Unsubscribe) Command() *imap.Command {
 }
 
 func (cmd *Unsubscribe) Parse(fields []interface{}) error {
-	if len(fields) < 0 {
+	if len(fields) < 1 {
 		return errors.New("No enogh arguments")
 	}
 

commands/uid.go

@@ -26,7 +26,7 @@ func (cmd *Uid) Command() *imap.Command {
 }
 
 func (cmd *Uid) Parse(fields []interface{}) error {
-	if len(fields) < 0 {
+	if len(fields) < 1 {
 		return errors.New("No command name specified")
 	}