read-cache API & users: make discard_index() return void

The discard_index() function has not returned non-zero since
7a51ed66f65 (Make on-disk index representation separate from in-core
one, 2008-01-14), but we've had various code in-tree still acting as
though that might be the case.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/cache.h b/cache.h
index 53dc434..489e9e1 100644
--- a/cache.h
+++ b/cache.h
@@ -774,7 +774,7 @@ void ensure_full_index(struct index_state *istate);
  */
 int write_locked_index(struct index_state *, struct lock_file *lock, unsigned flags);
 
-int discard_index(struct index_state *);
+void discard_index(struct index_state *);
 void move_index_extensions(struct index_state *dst, struct index_state *src);
 int unmerged_index(const struct index_state *);