commit e571b90ca9a068d641827d102a2935d34d87c441
from: Jonathan Rudenberg <jonathan@titanous.com>
via: Jeff Lindsay <progrium@gmail.com>
date: Wed Jun 21 00:56:40 2017 UTC

ufs: Allow fid to be 0

0 is a valid fid, so check against the NOFID value instead.

Signed-off-by: Jonathan Rudenberg <jonathan@titanous.com>

commit - 84f0f75de1046edef2d7f859f2ff09285b483bc8
commit + e571b90ca9a068d641827d102a2935d34d87c441
blob - 47220dc5c356829f11227b71bb7b65d11f01a380
blob + 5fd27ee2d96390c6e5a693acc20dd40c19ed4f63
--- ufs/session.go
+++ ufs/session.go
@@ -31,7 +31,7 @@ func (sess *session) getRef(fid p9p.Fid) (*FileRef, er
 	sess.Lock()
 	defer sess.Unlock()
 
-	if fid == 0 {
+	if fid == p9p.NOFID {
 		return nil, p9p.ErrUnknownfid
 	}
 
@@ -51,7 +51,7 @@ func (sess *session) newRef(fid p9p.Fid, path string) 
 	sess.Lock()
 	defer sess.Unlock()
 
-	if fid == 0 {
+	if fid == p9p.NOFID {
 		return nil, p9p.ErrUnknownfid
 	}