[6.0] 5c668420a Use SML_AllocBuf also for -sfile

[Dridi Boukelmoune]

commit 5c668420ad30ea86a42aa2bd464e3b7774902fb0
Author: Martin Blix Grydeland <martin at varnish-software.com>
Date:   Tue Jun 22 11:49:03 2021 +0200

    Use SML_AllocBuf also for -sfile

diff --git a/bin/varnishd/storage/storage_file.c b/bin/varnishd/storage/storage_file.c
index c2cb479ff..73177e14d 100644
--- a/bin/varnishd/storage/storage_file.c
+++ b/bin/varnishd/storage/storage_file.c
@@ -496,6 +496,8 @@ const struct stevedore smf_stevedore = {
 	.allocobj	=	SML_allocobj,
 	.panic		=	SML_panic,
 	.methods	=	&SML_methods,
+	.allocbuf	=	SML_AllocBuf,
+	.freebuf	=	SML_FreeBuf,
 };
 
 #ifdef INCLUDE_TEST_DRIVER