fixed difference in signedness warning

Modified: trunk/reactos/drivers/dd/bootvid/bootvid.c

--- trunk/reactos/drivers/dd/bootvid/bootvid.c	2005-12-10 00:06:42 UTC (rev 20030)
+++ trunk/reactos/drivers/dd/bootvid/bootvid.c	2005-12-10 00:07:40 UTC (rev 20031)
@@ -69,7 +69,7 @@

 static CLIENT_ID BitmapThreadId;
 static PUCHAR BootimageBitmap;
 

-static ULONG ShutdownNotify;

+static LONG ShutdownNotify;

 static KEVENT ShutdownCompleteEvent;
 
 /* DATA **********************************************************************/