[media] s3c-camif: Check if fmt is NULL before use

As reported by smatch:
	drivers/media/platform/s3c-camif/camif-capture.c:463 queue_setup() warn: variable dereferenced before check 'fmt' (see line 460)
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/platform/s3c-camif/camif-capture.c

@@ -449,19 +449,22 @@ static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *pfmt,
 	struct camif_vp *vp = vb2_get_drv_priv(vq);
 	struct camif_dev *camif = vp->camif;
 	struct camif_frame *frame = &vp->out_frame;
-	const struct camif_fmt *fmt = vp->out_fmt;
+	const struct camif_fmt *fmt;
 	unsigned int size;
 
 	if (pfmt) {
 		pix = &pfmt->fmt.pix;
 		fmt = s3c_camif_find_format(vp, &pix->pixelformat, -1);
+		if (fmt == NULL)
+			return -EINVAL;
 		size = (pix->width * pix->height * fmt->depth) / 8;
 	} else {
+		fmt = vp->out_fmt;
+		if (fmt == NULL)
+			return -EINVAL;
 		size = (frame->f_width * frame->f_height * fmt->depth) / 8;
 	}
 
-	if (fmt == NULL)
-		return -EINVAL;
 	*num_planes = 1;
 
 	if (pix)