Avoid double-unfreeze of arrays during grow.

Once we have called reshape_container or reshape_super we have handed
on the responsibility for unfreezing the array, so Grow_reshape
shouldn't call unfreeze.

Signed-off-by: NeilBrown <neilb@suse.de>

Grow.c

@@ -1595,6 +1595,8 @@ int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
 		rv = reshape_array(container, fd, devname, st, &info, force,
 				   backup_file, quiet, 0);
 	}
+	/* reshape_* released the array */
+	return rv;
 release:
 	unfreeze(st, frozen);
 	return rv;