[6.1] 8f250c0ea Plug minor leak when we fail loading a vcl

[hermunn]

commit 8f250c0ead0db46bd227198d0cc307044205496b
Author: Federico G. Schwindt <fgsch at lodoss.net>
Date:   Sat Sep 29 06:57:50 2018 -0600

    Plug minor leak when we fail loading a vcl

diff --git a/bin/varnishd/cache/cache_vcl.c b/bin/varnishd/cache/cache_vcl.c
index dd3267ea2..6827b7379 100644
--- a/bin/varnishd/cache/cache_vcl.c
+++ b/bin/varnishd/cache/cache_vcl.c
@@ -347,6 +347,7 @@ vcl_KillBackends(struct vcl *vcl)
 		REPLACE(vdir->cli_name, NULL);
 		AN(vdir->methods->destroy);
 		vdir->methods->destroy(vdir->dir);
+		FREE_OBJ(vdir->dir);
 		FREE_OBJ(vdir);
 	}
 }