Update top and systat for vfs.bufcache now being a long rather than an int.

usr.bin/systat/vmstat.c

@@ -115,7 +115,7 @@ static struct Info {
 	struct	nchstats nchstats;
 	long	nchcount;
 	long	*intrcnt;
-	int	bufspace;
+	long	bufspace;
 	int	desiredvnodes;
 	long	numvnodes;
 	long	freevnodes;

usr.bin/top/machine.c

@@ -433,7 +433,7 @@ get_system_info(struct system_info *si)
 		static unsigned int swap_delay = 0;
 		static int swapavail = 0;
 		static int swapfree = 0;
-		static int bufspace = 0;
+		static long bufspace = 0;
 		static int nspgsin, nspgsout;
 
 		GETSYSCTL("vfs.bufspace", bufspace);