Events: fixed test building with eventport on OS X.
Broken in d17f0584006f (1.9.13).
diff --git a/src/event/modules/ngx_eventport_module.c b/src/event/modules/ngx_eventport_module.c
index 9184547..cc9aadc 100644
--- a/src/event/modules/ngx_eventport_module.c
+++ b/src/event/modules/ngx_eventport_module.c
@@ -49,7 +49,7 @@
void *portnfy_user; /* user defined */
} port_notify_t;
-#if (__FreeBSD__) && (__FreeBSD_version < 700005)
+#if (__FreeBSD__ && __FreeBSD_version < 700005) || (NGX_DARWIN)
typedef struct itimerspec { /* definition per POSIX.4 */
struct timespec it_interval;/* timer period */