Remember to reset te bereq's workspace after use.

NB: This should be merged back to 1.1



git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@2181 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/cache_backend.c

@@ -161,6 +161,7 @@ VBE_free_bereq(struct bereq *bereq)
 {
 
 	CHECK_OBJ_NOTNULL(bereq, BEREQ_MAGIC);
+	WS_Reset(bereq->ws, NULL);
 	LOCK(&VBE_mtx);
 	VTAILQ_INSERT_HEAD(&bereq_head, bereq, list);
 	UNLOCK(&VBE_mtx);