[SNMP4J] Exception when closing snmp on 1.7RC1

[Matthieu Casanova]

Hi, I closed my snmp object and got this exception

java.lang.NullPointerException
       at org.snmp4j.transport.DefaultUdpTransportMapping.close(
DefaultUdpTransportMapping.java:93)
       at org.snmp4j.Snmp.close(Snmp.java:428)

I'm not sure but maybe during DefaultUdpTransportMapping.close, just after
the test
if (listener != null)

the run method finished and put listener = null (this listener = null; was
added in 1.7rc1) breaking the close method.
So is it a bug or is it because I forgot something ?

Matthieu