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login: use normal comparison to zero for integers
! is supposed to be used for booleans and pointers.
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@ -269,7 +269,7 @@ int seat_set_active(Seat *s, Session *session) {
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int seat_switch_to(Seat *s, unsigned int num) {
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/* Public session positions skip 0 (there is only F1-F12). Maybe it
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* will get reassigned in the future, so return error for now. */
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if (!num)
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if (num == 0)
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return -EINVAL;
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if (num >= s->position_count || !s->positions[num]) {
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@ -286,7 +286,7 @@ int seat_switch_to(Seat *s, unsigned int num) {
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int seat_switch_to_next(Seat *s) {
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unsigned int start, i;
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if (!s->position_count)
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if (s->position_count == 0)
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return -EINVAL;
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start = 1;
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@ -307,7 +307,7 @@ int seat_switch_to_next(Seat *s) {
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int seat_switch_to_previous(Seat *s) {
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unsigned int start, i;
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if (!s->position_count)
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if (s->position_count == 0)
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return -EINVAL;
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start = 1;
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@ -476,14 +476,14 @@ void seat_evict_position(Seat *s, Session *session) {
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session->pos = 0;
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if (!pos)
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if (pos == 0)
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return;
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if (pos < s->position_count && s->positions[pos] == session) {
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s->positions[pos] = NULL;
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/* There might be another session claiming the same
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* position (eg., during gdm->session transition), so lets look
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* position (eg., during gdm->session transition), so let's look
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* for it and set it on the free slot. */
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LIST_FOREACH(sessions_by_seat, iter, s->sessions) {
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if (iter->pos == pos) {
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