Exception on xep-0050 element

Hi,

I'm using Smack 4.0.5 in a java stand alone client for calling a remote xmpp server.

It seems that Smack doesn't like an empty <node/> element sent by the server. Please check the following server message and the consequent Smack Exception:

<iq type="result" id="agsXMPP_8" to="admin-l-b0b@lxrt2-newbingo-as01.lottomatica.net/CAT">

       <command xmlns="http://jabber.org/protocol/commands" sessionid="2ykD1043j47e7H1" node="http://bossmedia.com/protocol/bingo-admin#create-muc-room" status="completed">

             <note/>

             <x xmlns="jabber:x:data" type="result">

                    <reported>

                           <field var="room_jid" type="text-single" label="Room JID"/>

                    </reported>

                    <item>

                           <field var="room_jid">

                                  <value>testgioid@msg01.lxrt2-newbingo-as01.lottomatica.net</value>

                           </field>

                    </item>

             </x>

       </command>

</iq>

java.lang.NullPointerException: Name is null

    at java.lang.Enum.valueOf(Enum.java:235)

    at org.jivesoftware.smackx.commands.AdHocCommandNote$Type.valueOf(AdHocCommandNote .java:62)

    at org.jivesoftware.smackx.commands.provider.AdHocCommandDataProvider.parseIQ(AdHo cCommandDataProvider.java:99)

    at org.jivesoftware.smack.util.PacketParserUtils.parseIQ(PacketParserUtils.java:46 3)

    at org.jivesoftware.smack.tcp.PacketReader.parsePackets(PacketReader.java:174)

    at org.jivesoftware.smack.tcp.PacketReader.access$000(PacketReader.java:47)

    at org.jivesoftware.smack.tcp.PacketReader$1.run(PacketReader.java:81)

If I force the server to send something inside the <node> element, everything works well. E.g.:

<iq type="result" id="agsXMPP_8" to="admin-l-b0b@lxrt2-newbingo-as01.lottomatica.net/CAT">

       <command xmlns="http://jabber.org/protocol/commands" sessionid="2ykD1043j47e7H1" node="http://bossmedia.com/protocol/bingo-admin#create-muc-room" status="completed">

             <note type="info">Don't look at me</note>

             <x xmlns="jabber:x:data" type="result">

                    <reported>

                           <field var="room_jid" type="text-single" label="Room JID"/>

                    </reported>

                    <item>

                           <field var="room_jid">

                                  <value>testgioid@msg01.lxrt2-newbingo-as01.lottomatica.net</value>

                           </field>

                    </item>

             </x>

       </command>

</iq>

I've searched the documentation for this <note> element and I've found this: XEP-0050: Ad-Hoc Commands

It seems that an empty <note/> should be allowed.

Could it be a Smack bug?

Thanks

John