[master] 521324839 Assert

[Dridi Boukelmoune]

commit 52132483928766aa0dfc485182be9b552392bbc5
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Wed Apr 3 14:46:22 2019 +0200

    Assert

diff --git a/bin/varnishd/cache/cache_obj.c b/bin/varnishd/cache/cache_obj.c
index 4c0ec76bb..5a807e869 100644
--- a/bin/varnishd/cache/cache_obj.c
+++ b/bin/varnishd/cache/cache_obj.c
@@ -367,6 +367,7 @@ ObjBocDone(struct worker *wrk, struct objcore *oc, struct boc **boc)
 	const struct obj_methods *m;
 
 	CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
+	CHECK_OBJ_NOTNULL(oc, OBJCORE_MAGIC);
 	AN(boc);
 	CHECK_OBJ_NOTNULL(*boc, BOC_MAGIC);
 	if (oc->stobj->stevedore != NULL) {