[PATCH 03/41] am.c: use the stdlib EXIT_SUCCESS or EXIT_FAILURE exit status

[Elia Pinto <gitter.spiros@gmail.com>]

The C standard specifies two constants, EXIT_SUCCESS and  EXIT_FAILURE, that may
be  passed  to exit() to indicate successful or unsuccessful termination,
respectively. The value of status in exit(status) may be EXIT_SUCCESS,
EXIT_FAILURE, or any other value, though only the least significant 8 bits (that
is, status & 0377) shall be available to a waiting parent proces. So exit(-1)
return 255.

Use the C standard EXIT_SUCCESS and EXIT_FAILURE to indicate the program exit
status instead of "0" or "1", respectively. In <stdlib.h> EXIT_FAILURE has the
value "1": use EXIT_FAILURE even if the program uses exit(-1), ie 255, for
consistency.

Signed-off-by: Elia Pinto <gitter.spiros@gmail.com>
---
 builtin/am.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/builtin/am.c b/builtin/am.c
index 0f4111bafa..ac74bce555 100644
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -1638,7 +1638,7 @@ static void do_commit(const struct am_state *state)
 	struct strbuf sb = STRBUF_INIT;
 
 	if (run_hooks("pre-applypatch"))
-		exit(1);
+		exit(EXIT_FAILURE);
 
 	if (write_cache_as_tree(&tree, 0, NULL))
 		die(_("git write-tree failed to write a tree"));
@@ -1841,7 +1841,7 @@ static void am_run(struct am_state *state, int resume)
 		}
 
 		if (run_applypatch_msg_hook(state))
-			exit(1);
+			exit(EXIT_FAILURE);
 		if (to_keep)
 			goto commit;
 
-- 
2.35.1