[master] 8b70202 Missing matchproto

[Dridi Boukelmoune]

commit 8b7020270a6bb14ed6931d93936c77e75513b1c5
Author: Dridi Boukelmoune <dridi at varnish-software.com>
Date:   Tue Jan 30 11:53:40 2018 +0100

    Missing matchproto

diff --git a/bin/varnishd/cache/cache_backend_probe.c b/bin/varnishd/cache/cache_backend_probe.c
index b362cec..a6c945d 100644
--- a/bin/varnishd/cache/cache_backend_probe.c
+++ b/bin/varnishd/cache/cache_backend_probe.c
@@ -415,7 +415,7 @@ vbp_task(struct worker *wrk, void *priv)
 /*--------------------------------------------------------------------
  */
 
-static void * v_matchproto_()
+static void * v_matchproto_(bgthread_t)
 vbp_thread(struct worker *wrk, void *priv)
 {
 	double now, nxt;