output: fix clock_gettime return value handling
@@ -566,7 +566,8 @@ void wlr_output_send_present(struct wlr_output *output, struct timespec *when,
struct timespec now;
if (when == NULL) {
clockid_t clock = wlr_backend_get_present_clock(output->backend);
- if (!clock_gettime(clock, &now)) {
+ errno = 0;
+ if (clock_gettime(clock, &now) != 0) {
wlr_log_errno(WLR_ERROR, "failed to send output present event: "
"failed to read clock");
return;
