s4-spn: don't try and send an empty SPN list

Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org>

diff --git a/source4/scripting/bin/samba_spnupdate b/source4/scripting/bin/samba_spnupdate
index 6a69f48a45d1f9666d6f1ddc75bcc4cd6bbdbd70..502eebaf537b64efe29c64d159df9a70bb6b60e0 100755 (executable)
--- a/source4/scripting/bin/samba_spnupdate
+++ b/source4/scripting/bin/samba_spnupdate
@@ -212,6 +212,8 @@ def call_rodc_update(d):
         ns.str = n
         spn_names.append(ns)
         req1.count = req1.count + 1
+    if spn_names == []:
+        return
     req1.spn_names = spn_names
     (level, res) = drs.DsWriteAccountSpn(drs_handle, 1, req1)