send-email: fix threaded mails without chain-reply-to

diff --git a/archive-tar.c b/archive-tar.c
index ba890ebdecd8672aeb32757605c8a2976fa21161..cee06ce3cbc1819008337633ed0753638c423ac5 100644 (file)
--- a/archive-tar.c
+++ b/archive-tar.c
@@ -180,7 +180,7 @@ static int write_tar_entry(struct archiver_args *args,
 
        sprintf(header.mode, "%07o", mode & 07777);
        sprintf(header.size, "%011lo", S_ISREG(mode) ? size : 0);
-       sprintf(header.mtime, "%011lo", args->time);
+       sprintf(header.mtime, "%011lo", (unsigned long) args->time);
 
        sprintf(header.uid, "%07o", 0);
        sprintf(header.gid, "%07o", 0);