[PATCH] userdiff.h: add missing declaration (hdr-check)

[Ramsay Jones]

Signed-off-by: Ramsay Jones <ram...@ramsayjones.plus.com>
---

Hi Junio,

... and this is the patch I needed for the current 'pu' branch.

ATB,
Ramsay Jones

 userdiff.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/userdiff.h b/userdiff.h
index dad3fc03c1..b072bfe89a 100644
--- a/userdiff.h
+++ b/userdiff.h
@@ -3,6 +3,8 @@
 
 #include "notes-cache.h"
 
+struct index_state;
+
 struct userdiff_funcname {
        const char *pattern;
        int cflags;
-- 
2.19.0