Fix integer overflow

packet-exchange/src/client.c

@@ -252,8 +252,11 @@ static void print_histograms() {
 
   int interval = param->interval / 1000;
   uint64_t duration = interval * param->stats.nb_cycles;
-  int duration_hour = duration / (1000000l * 3600);
-  int duration_minutes = duration / (1000000l * 60) - (duration_hour * 60);
+  int duration_hour = duration / 1000000;
+  duration_hour /= 3600;
+  int duration_minutes = duration / 1000000l;
+  duration_minutes /= 60;
+  duration_minutes -= duration_hour * 60;
 
   printf("], ");
   printf("\"props_type\": \"histogram\", \"metadata\": {\"i\": \"%dus\", \"duration\": \"%dh%d\"}}\n", interval, duration_hour, duration_minutes);