Add assert

git-svn-id: http://www.varnish-cache.org/svn/trunk@649 d4fa192b-c00b-0410-8231-f00ffab90ce4

lib/libvarnish/binary_heap.c

@@ -177,8 +177,8 @@ binheap_delete(struct binheap *bh, unsigned idx)
 	assert(bh->magic == BINHEAP_MAGIC);
 	assert(bh->next > ROOT_IDX);
 	assert(idx < bh->next);
-	if (bh->update != NULL)
-		bh->update(bh->priv, bh->array[idx], 0);
+	assert(idx > 0);
+	bh->update(bh->priv, bh->array[idx], 0);
 	if (idx == --bh->next)
 		return;
 	bh->array[idx] = bh->array[bh->next];