use %u instead of %d for unsigned int arguments

lib/dns/tests/name_test.c

@@ -542,7 +542,7 @@ ATF_TC_BODY(countlabels, tc) {
 					      NULL, 0, NULL);
 		ATF_REQUIRE_EQ(result, ISC_R_SUCCESS);
 
-		printf("%s: expect %d labels\n",
+		printf("%s: expect %u labels\n",
 		       testcases[i].namestr, testcases[i].expect);
 
 		ATF_REQUIRE_EQ(dns_name_countlabels(name),

lib/isc/tests/task_test.c

@@ -1135,7 +1135,7 @@ test_purge(int sender, int type, int tag, int exp_purged) {
 		/*
 		 * We're testing isc_task_purge.
 		 */
-		printf("purge events %p,%d,%p\n",
+		printf("purge events %p,%u,%p\n",
 		       purge_sender, purge_type_first, purge_tag);
 		purged = isc_task_purge(task, purge_sender,
 					(isc_eventtype_t)purge_type_first,

lib/isc/tests/timer_test.c

@@ -138,8 +138,8 @@ ticktock(isc_task_t *task, isc_event_t *event) {
 	}
 
 	if (event->ev_type != expected_event_type) {
-		printf("expected event type %d, got %d\n",
-		       expected_event_type, (int) event->ev_type);
+		printf("expected event type %u, got %u\n",
+		       expected_event_type, event->ev_type);
 	}
 
 	result = isc_time_now(&now);