Patch from Tim Angus, to fix a longstanding bug

in the server, wherein running the server for
more than 24 hours would cause the game to
exhibit weirdness as described here:
http://forums.wireheadstudios.org/index.php?act=ST&f=11&t=2749

That page would also indicate that more work
needs to be done if the map isn't going to change
for more than 24 hours.

code/server/sv_snapshot.c

@@ -160,7 +160,7 @@ static void SV_WriteSnapshotToClient( client_t *client, msg_t *msg ) {
 
 	// send over the current server time so the client can drift
 	// its view of time to try to match
-	MSG_WriteLong (msg, svs.time);
+	MSG_WriteLong (msg, sv.time);
 
 	// what we are delta'ing from
 	MSG_WriteByte (msg, lastframe);