Fix one of the lastest commit. This bio_caller1 should also be changed to

bio_driver1 (as all the rest).
This introduced a small memory leak, but it wasn't really critical,
because maximum memory for g_stripe_zone is always set, so after few
requests gstripe was working in "economic" mode.

sys/geom/stripe/g_stripe.c

@@ -396,7 +396,7 @@ g_stripe_start_fast(struct bio *bp, u_int no, off_t offset, off_t length)
 		}
 	}
 	if (data != NULL)
-		bp->bio_caller1 = data;
+		bp->bio_driver1 = data;
 	/*
 	 * Fire off all allocated requests!
 	 */