[B.A.T.M.A.N.] [PATCH] batman-adv: Fixes rounding issues in vis.c

["Linus Lüssing" <linus.luessing@web.de>]

This patches fixes two rounding issues in vis.c for sending and
purging vis packets. Before, the timers and timeouts always got
rounded down to seconds, though we want a precision in
milliseconds.
This also fixes a kernel panic that occures when lowering the
timer for sending vis packets (vis_interval) to less than 1000ms
in main.c manually.

Signed-off-by: Linus Lüssing <linus.luessing@web.de>
---

Index: vis.c
===================================================================
--- vis.c	(revision 1505)
+++ vis.c	(working copy)
@@ -377,7 +377,7 @@
 		if (info == my_vis_info)	/* never purge own data. */
 			continue;
 		if (time_after(jiffies,
-			       info->first_seen + (VIS_TIMEOUT/1000)*HZ)) {
+			       info->first_seen + (VIS_TIMEOUT*HZ)/1000)) {
 			hash_remove_bucket(vis_hash, &hashit);
 			free_info(info);
 		}
@@ -556,5 +556,5 @@
 static void start_vis_timer(void)
 {
 	queue_delayed_work(bat_event_workqueue, &vis_timer_wq,
-			   (atomic_read(&vis_interval)/1000) * HZ);
+			   (atomic_read(&vis_interval) * HZ ) / 1000);
 }