[PATCH] git.c: fix sparse warning

[Ramsay Jones <ramsay@ramsayjones.plus.com>]

Commit 4acc44d720 (config: add setting to ignore sparsity patterns in
some cmds, 2020-05-27) adds an external symbol definition without a
corresponding external symbol declaration. This causes sparse to
complain: "symbol 'opt_restrict_to_sparse_paths' was not declared.
Should it be static?".

In order to suppress the warning, #include the 'sparse-checkout.h'
header file, which contains the required extern declaration.

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

Hi Matheus,

If you need to re-roll your 'mt/grep-sparse-checkout' branch, could you
please squash this into the relevant patch.

[This is the minimum fix - but I might be tempted to move the definition
of the variable to 'sparse-checkout.c' as well.]

Thanks!

ATB,
Ramsay Jones

 git.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/git.c b/git.c
index 07de4363ef..6e62001f2f 100644
--- a/git.c
+++ b/git.c
@@ -5,6 +5,7 @@
 #include "run-command.h"
 #include "alias.h"
 #include "shallow.h"
+#include "sparse-checkout.h"
 
 #define RUN_SETUP		(1<<0)
 #define RUN_SETUP_GENTLY	(1<<1)
-- 
2.26.2