crash with libevent 1.0

[Ted Schundler]

in delete_handler(...) in memcached.c, replacing the
   evtimer_del(&deleteevent);
with:
    static int initialized=0;

    if (initialized==1) {
        evtimer_del(&deleteevent);
    } else {
        initialized=1;
    }

seems to make it work happily (so far) with libevent 1.0. The problem
seems to be that the function to delete an event tries to acces a
pointer from a member of the event structure, without checking if it
has been initialized. Reading the libevent manpage, this seems to be
incorrect behavior, but if a patch like that is applied, then there is
no problem event if/when it is fixed.