main: Fix exit status on buffer alloc failure

Fixes an issue in code moved in commit ad183ca4.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/main.c b/src/main.c
index 4ad711c..b5f518b 100644
--- a/src/main.c
+++ b/src/main.c
@@ -69,7 +69,7 @@ main(int argc, const char *argv[])
 
 	buf = _concat_args(argc - 1, argv + 1);
 	if (buf == NULL) {
-		return -1;
+		return EXIT_FAILURE;
 	}
 
 	if (datetime_parse(buf, &arg) < 0) {