various smaller fixes

src/disk_io_thread.cpp

@@ -378,6 +378,7 @@ namespace libtorrent
 		disk_io_job j;
 		m_waiting_to_shutdown = true;
 		j.action = disk_io_job::abort_thread;
+		j.start_time = time_now_hires();
 		m_jobs.insert(m_jobs.begin(), j);
 		m_signal.signal(l);
 	}

src/policy.cpp

@@ -744,6 +744,7 @@ namespace libtorrent
 		if (found)
 		{
 			i = *iter;
+			TORRENT_ASSERT(i->connection != &c);
 
 			if (i->banned)
 			{

test/test_primitives.cpp

@@ -383,7 +383,7 @@ TORRENT_EXPORT void find_control_url(int type, char const* string, parse_state&
 
 address rand_v4()
 {
-	return address_v4(rand() << 16 | rand());
+	return address_v4((rand() << 16 | rand()) & 0xffffffff);
 }
 
 int test_main()