Fix conversion

Author: xonatius

src/sys/time.rs

@@ -69,7 +69,10 @@ impl From<timespec> for TimeSpec {
 
 impl From<Duration> for TimeSpec {
     fn from(duration: Duration) -> Self {
-        TimeSpec(timespec { tv_sec: duration.as_secs() as i64, tv_nsec: duration.subsec_nanos() as i64 })
+        TimeSpec(timespec {
+            tv_sec: duration.as_secs() as time_t,
+            tv_nsec: duration.subsec_nanos() as c_long
+        })
     }
 }