V4L/DVB (13523): dvb-bt8xx: fix compile warning

Fix this compile warning:

v4l/dvb-bt8xx.c: In function 'cx24108_tuner_set_params':
v4l/dvb-bt8xx.c:221: warning: array subscript is above array bounds

Make sure that we never get past the last element in the array.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/bt8xx/dvb-bt8xx.c

@@ -215,7 +215,7 @@ static int cx24108_tuner_set_params(struct dvb_frontend* fe, struct dvb_frontend
 		freq = 2150000; /* satellite IF is 950..2150MHz */
 
 	/* decide which VCO to use for the input frequency */
-	for(i = 1; (i < ARRAY_SIZE(osci)) && (osci[i] < freq); i++);
+	for(i = 1; (i < ARRAY_SIZE(osci) - 1) && (osci[i] < freq); i++);
 	printk("cx24108 debug: select vco #%d (f=%d)\n",i,freq);
 	band=bandsel[i];
 	/* the gain values must be set by SetSymbolrate */