quotacheck: Fix buggy error check of read(2)

'rd' was declared as size_t which is unsigned so it could never be less
than 0. Fix it by declaring 'rd' as ssize_t which is the real read(2)
return type.

Signed-off-by: Jan Kara <jack@suse.cz>

1 files changed, 1 insertions, 1 deletions

diff --git a/quotacheck_v2.c b/quotacheck_v2.c
index de4293f..4cc8558 100644
--- a/quotacheck_v2.c
+++ b/quotacheck_v2.c
@@ -233,7 +233,7 @@ static int buffer_entry(dqbuf_t buf, uint blk, int *corrupted, uint * lblk, int
 
 static void check_read_blk(int fd, uint blk, dqbuf_t buf)
 {
-	size_t rd;
+	ssize_t rd;
 
 	lseek(fd, blk << QT_BLKSIZE_BITS, SEEK_SET);
 	rd = read(fd, buf, QT_BLKSIZE);