close #2 When we find out the event pointer is null, we don't neeed to delete it.
close #2
When we find out the event pointer is null, we don't neeed to delete it.

hemingcui/libevent_paxos,hemingcui/libevent_paxos,hemingcui/libevent_paxos,hemingcui/libevent_paxos,milannic/libevent_paxos,milannic/libevent_paxos,milannic/libevent_paxos,hemingcui/libevent_paxos,hemingcui/libevent_paxos,milannic/libevent_paxos,milannic/libevent_paxos,milannic/libevent_paxos,milannic/libevent_paxos,milannic/libevent_paxos,hemingcui/libevent_paxos,hemingcui/libevent_paxos