V4L/DVB (10335): gspca - all subdrivers: Fix CodingStyle in sd_mod_init function.

Introduce int ret and check it value after call to usb_register().

Signed-off-by: Alexey Klimov <klimov.linux@gmail.com>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/gspca/mars.c b/drivers/media/video/gspca/mars.c
index ba79afb..420224a 100644
--- a/drivers/media/video/gspca/mars.c
+++ b/drivers/media/video/gspca/mars.c
@@ -420,7 +420,9 @@
 /* -- module insert / remove -- */
 static int __init sd_mod_init(void)
 {
-	if (usb_register(&sd_driver) < 0)
+	int ret;
+	ret = usb_register(&sd_driver);
+	if (ret < 0)
 		return -1;
 	PDEBUG(D_PROBE, "registered");
 	return 0;