[media] tda18218: fix compile warning

drivers/media/common/tuners/tda18218.c: In function 'tda18218_wr_regs':
drivers/media/common/tuners/tda18218.c:58:5: warning: 'ret' may be used uninitialized in this function
Signed-off-by: NHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/common/tuners/tda18218.c

@@ -28,7 +28,7 @@ MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
 /* write multiple registers */
 static int tda18218_wr_regs(struct tda18218_priv *priv, u8 reg, u8 *val, u8 len)
 {
-	int ret;
+	int ret = 0;
 	u8 buf[1+len], quotient, remainder, i, msg_len, msg_len_max;
 	struct i2c_msg msg[1] = {
 		{