a problem that looping traversal s_subscribers[i] in ulog_subscribe().

[Jacky9966520]

int main(){
ulog_init();

ULOG_SUBSCRIBE(A, ULOG_DEBUG); //threshold=101
ULOG_SUBSCRIBE(B, ULOG_WARNING); // threshold=103,current: s_lowest_log_level = 101
ULOG_SUBSCRIBE(A, ULOG_ERROR); // threshold=​104
....
}
When program executed ULOG_SUBSCRIBE(A, ULOG_ERROR); the value of s_lowest_log_level still equal to 101.It should equal to 103.