[PATCH] refspec.h: reinstate 'extern' to fix sparse warning

[Ramsay Jones]

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

Hi Brandon,

If you need to re-roll your 'bw/refspec-api' branch, could you please
squash this, or the equivalent change before the 'struct refname' to
'struct refname_item' name change, into the relevant patch. (which
would be patch #1, commit 8999381ed).

This patch was built on top of 'pu', but as I said above, patch #1
is where the original 'extern' keyword was dropped. (see first hunk
of the diff to 'remote.h').

Thanks!

ATB,
Ramsay Jones

 refspec.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/refspec.h b/refspec.h
index 374f8ea63..7e1ff94ac 100644
--- a/refspec.h
+++ b/refspec.h
@@ -2,7 +2,7 @@
 #define REFSPEC_H
 
 #define TAG_REFSPEC "refs/tags/*:refs/tags/*"
-const struct refspec_item *tag_refspec;
+extern const struct refspec_item *tag_refspec;
 
 struct refspec_item {
        unsigned force : 1;
-- 
2.17.0