latencyTimeSeries structure max field type fixed.

src/latency.h

@@ -46,7 +46,7 @@ struct latencySample {
 /* The latency time series for a given event. */
 struct latencyTimeSeries {
     int idx; /* Index of the next sample to store. */
-    mstime_t max; /* Max latency observed for this event. */
+    uint32_t max; /* Max latency observed for this event. */
     struct latencySample samples[LATENCY_TS_LEN]; /* Latest history. */
 };