posixtz: ensure the file offset we pass to lseek is off_t

on 32-bit systems, sizeof(off_t) is 4, on 64-bit sizeof(off_t) is 8
causing a word masking issue.

1 files changed, 1 insertions, 1 deletions

diff --git a/posixtz.c b/posixtz.c
index cddcb3e..972ca31 100644
--- a/posixtz.c
+++ b/posixtz.c
@@ -36,7 +36,7 @@ char *posix_tz(const char *filename)
 	if (r != TZ_BUFLEN
 	    || strncmp(buf, "TZif", 4) != 0
 	    || (unsigned char)buf[4] < 2
-	    || lseek(fd, -TZ_BUFLEN, SEEK_END) < 0
+	    || lseek(fd, (off_t) -TZ_BUFLEN, SEEK_END) < 0
 	   )
 		goto ERROR;