Time event next id auto increment if any error happened

[runrunwang]

long long aeCreateTimeEvent(aeEventLoop *eventLoop, long long milliseconds,
        aeTimeProc *proc, void *clientData,
        aeEventFinalizerProc *finalizerProc)
{
    long long id = eventLoop->timeEventNextId++;
    aeTimeEvent *te;

    te = zmalloc(sizeof(*te)); 
    if (te == NULL) return AE_ERR; 
    .......
}

when te structure can not be allocated, this function return a error with timeEventNextId auto incremented. i think first check whether memory allocation is successful, and then auto increment might be a better option.