Make sundry time values be unsigned.

message.c

@@ -491,7 +491,7 @@ flushbuf(struct network *net)
 static void
 schedule_flush(struct network *net)
 {
-    int msecs = jitter(net, 0);
+    unsigned msecs = jitter(net, 0);
     if(net->flush_timeout.tv_sec != 0 &&
        timeval_minus_msec(&net->flush_timeout, &now) < msecs)
         return;
@@ -504,7 +504,7 @@ static void
 schedule_flush_now(struct network *net)
 {
     /* Almost now */
-    int msecs = roughly(10);
+    unsigned msecs = roughly(10);
     if(net->flush_timeout.tv_sec != 0 &&
        timeval_minus_msec(&net->flush_timeout, &now) < msecs)
         return;
@@ -514,12 +514,10 @@ schedule_flush_now(struct network *net)
 }
 
 static void
-schedule_unicast_flush(int msecs)
+schedule_unicast_flush(unsigned msecs)
 {
     if(!unicast_neighbour)
         return;
-    if(msecs < 0)
-        msecs = jitter(unicast_neighbour->network, 1);
     if(unicast_flush_timeout.tv_sec != 0 &&
        timeval_minus_msec(&unicast_flush_timeout, &now) < msecs)
         return;
@@ -926,7 +924,7 @@ flushupdates(void)
 static void
 schedule_update_flush(struct network *net, int urgent)
 {
-    int msecs;
+    unsigned msecs;
     msecs = update_jitter(net, urgent);
     if(update_flush_timeout.tv_sec != 0 &&
        timeval_minus_msec(&update_flush_timeout, &now) < msecs)

neighbour.c

@@ -198,7 +198,7 @@ update_neighbour(struct neighbour *neigh, int hello, int hello_interval)
 static int
 reset_txcost(struct neighbour *neigh)
 {
-    int delay;
+    unsigned delay;
 
     delay = timeval_minus_msec(&now, &neigh->ihu_time);
 
@@ -228,8 +228,8 @@ unsigned
 check_neighbours()
 {
     struct neighbour *neigh;
-    int changed, delay;
-    int msecs = 50000;
+    int changed;
+    unsigned msecs = 50000, delay;
 
     debugf("Checking neighbours.\n");
 
@@ -268,7 +268,7 @@ check_neighbours()
 unsigned
 neighbour_rxcost(struct neighbour *neigh)
 {
-    int delay;
+    unsigned delay;
     unsigned short reach = neigh->reach;
 
     delay = timeval_minus_msec(&now, &neigh->hello_time);

network.c

@@ -114,7 +114,7 @@ update_hello_interval(struct network *net)
 
 /* This should be no more than half the hello interval, so that hellos
    aren't sent late.  The result is in milliseconds. */
-unsigned int
+unsigned
 jitter(struct network *net, int urgent)
 {
     unsigned interval = net->hello_interval;
@@ -125,7 +125,7 @@ jitter(struct network *net, int urgent)
     return roughly(interval) / 4;
 }
 
-unsigned int
+unsigned
 update_jitter(struct network *net, int urgent)
 {
     unsigned interval = net->hello_interval;

network.h

@@ -63,8 +63,8 @@ extern int numnets;
 struct network *add_network(char *ifname);
 int network_idle(struct network *net);
 int update_hello_interval(struct network *net);
-unsigned int jitter(struct network *net, int urgent);
-unsigned int update_jitter(struct network *net, int urgent);
+unsigned jitter(struct network *net, int urgent);
+unsigned update_jitter(struct network *net, int urgent);
 void delay_jitter(struct timeval *time, struct timeval *timeout, int msecs);
 int network_up(struct network *net, int up);
 int network_ll_address(struct network *net, const unsigned char *address);