V4L/DVB: VIDEO: ivtvfb, remove unneeded NULL test

Stanse found that in ivtvfb_callback_cleanup and ivtvfb_callback_init
there are unneeded tests for itv being NULL. But itv is initialized
as container_of with non-zero offset in those functions, so it is
never NULL (even if v4l2_dev is). This was found because itv is
dereferenced earlier than the test.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Reviewed-by: Andy Walls <awalls@md.metrocast.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/ivtv/ivtvfb.c

@@ -1239,7 +1239,7 @@ static int __init ivtvfb_callback_init(struct device *dev, void *p)
 	struct v4l2_device *v4l2_dev = dev_get_drvdata(dev);
 	struct ivtv *itv = container_of(v4l2_dev, struct ivtv, v4l2_dev);
 
-	if (itv && (itv->v4l2_cap & V4L2_CAP_VIDEO_OUTPUT)) {
+	if (itv->v4l2_cap & V4L2_CAP_VIDEO_OUTPUT) {
 		if (ivtvfb_init_card(itv) == 0) {
 			IVTVFB_INFO("Framebuffer registered on %s\n",
 					itv->v4l2_dev.name);
@@ -1255,7 +1255,7 @@ static int ivtvfb_callback_cleanup(struct device *dev, void *p)
 	struct ivtv *itv = container_of(v4l2_dev, struct ivtv, v4l2_dev);
 	struct osd_info *oi = itv->osd_info;
 
-	if (itv && (itv->v4l2_cap & V4L2_CAP_VIDEO_OUTPUT)) {
+	if (itv->v4l2_cap & V4L2_CAP_VIDEO_OUTPUT) {
 		if (unregister_framebuffer(&itv->osd_info->ivtvfb_info)) {
 			IVTVFB_WARN("Framebuffer %d is in use, cannot unload\n",
 				       itv->instance);