[master] eb14a0b68 Assert

[Dridi Boukelmoune]

commit eb14a0b68ded6a332c2e4f528c300678abb39fd7
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Wed Jan 15 15:39:04 2020 +0100

    Assert

diff --git a/bin/varnishd/cache/cache_gzip.c b/bin/varnishd/cache/cache_gzip.c
index 694ee43d4..33d7e7ae1 100644
--- a/bin/varnishd/cache/cache_gzip.c
+++ b/bin/varnishd/cache/cache_gzip.c
@@ -314,6 +314,7 @@ vdp_gunzip_init(struct req *req, void **priv)
 
 	boc = HSH_RefBoc(req->objcore);
 	if (boc != NULL) {
+		CHECK_OBJ(boc, BOC_MAGIC);
 		bos = boc->state;
 		HSH_DerefBoc(req->wrk, req->objcore);
 	} else