Add SetXAttr to WrappingPathFilesystem.

Make sure this doesn't fail again.

fuse/default_test.go

 package fuse
 
-// Compilation test for DummyFuse and DummyPathFuse
+// Make sure library supplied Filesystems support the
+// required interface.
 
 import (
 	"testing"
 )
 
-func TestDummy(t *testing.T) {
-	fs := new(DefaultRawFuseFileSystem)
-	NewMountState(fs)
+func TestRawFs(t *testing.T) {
+	var iface RawFileSystem
 
-	pathFs := new(DefaultPathFilesystem)
+	iface = new(DefaultRawFuseFileSystem)
+	iface = new(WrappingRawFilesystem)
+	iface = new(TimingRawFilesystem)
 
-	NewPathFileSystemConnector(pathFs)
+	_ = iface
+}
+
+func TestPathFs(t *testing.T) {
+	var iface PathFilesystem
+	iface = new(DefaultPathFilesystem)
+	iface = new(WrappingPathFilesystem)
+	iface = new(TimingPathFilesystem)
+
+	_ = iface
 }
 
 func TestDummyFile(t *testing.T) {

fuse/wrappedfs.go

@@ -86,6 +86,10 @@ func (me *WrappingPathFilesystem) GetXAttr(name string, attr string) ([]byte, St
 	return me.Original.GetXAttr(name, attr)
 }
 
+func (me *WrappingPathFilesystem) SetXAttr(name string, attr string, data []byte, flags int) Status {
+	return me.Original.SetXAttr(name, attr, data, flags)
+}
+
 func (me *WrappingPathFilesystem) ListXAttr(name string) ([]string, Status) {
 	return me.Original.ListXAttr(name)
 }