[master] 131ec87 Forgot the prototype in previous commit.

[Poul-Henning Kamp]

commit 131ec87b78f9b5f767e6cfbbc55c42940da56984
Author: Poul-Henning Kamp <phk at FreeBSD.org>
Date:   Mon Feb 23 21:52:20 2015 +0000

    Forgot the prototype in previous commit.

diff --git a/include/vnum.h b/include/vnum.h
index cf55c9a..02ca517 100644
--- a/include/vnum.h
+++ b/include/vnum.h
@@ -29,4 +29,5 @@
  */
 
 /* from libvarnish/vnum.c */
+double VNUM(const char *p);
 const char *VNUM_2bytes(const char *p, uintmax_t *r, uintmax_t rel);