ipn/ipnlocal: make FileTargets check IPN state first

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>

ipn/ipnlocal/local.go

@@ -2425,13 +2425,13 @@ func (b *LocalBackend) FileTargets() ([]*apitype.FileTarget, error) {
 
 	b.mu.Lock()
 	defer b.mu.Unlock()
-	if !b.capFileSharing {
-		return nil, errors.New("file sharing not enabled by Tailscale admin")
-	}
 	nm := b.netMap
 	if b.state != ipn.Running || nm == nil {
 		return nil, errors.New("not connected")
 	}
+	if !b.capFileSharing {
+		return nil, errors.New("file sharing not enabled by Tailscale admin")
+	}
 	for _, p := range nm.Peers {
 		if p.User != nm.User {
 			continue