internal/app: check transmitted ops

This simulates params to shim and this is the last step before params to shim is merged.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/app/sptmpdir.go

@@ -1,6 +1,8 @@
 package app
 
 import (
+	"encoding/gob"
+
 	"hakurei.app/container/bits"
 	"hakurei.app/container/check"
 	"hakurei.app/container/fhs"
@@ -9,6 +11,8 @@ import (
 	"hakurei.app/system/acl"
 )
 
+func init() { gob.Register(spTmpdirOp{}) }
+
 // spTmpdirOp sets up TMPDIR inside the container.
 type spTmpdirOp struct{}