fix buggy redhat code exhausted only in -Os which corrupted

memory and gave wrong results for download file size in FTP/HTTP
installs

1 files changed, 1 insertions, 1 deletions

diff --git a/mdk-stage1/url.c b/mdk-stage1/url.c
index 47014fcb7..0c4dbbedf 100644
--- a/mdk-stage1/url.c
+++ b/mdk-stage1/url.c
@@ -337,7 +337,7 @@ static int ftp_get_filesize(int sock, char * remotename)
 	}
 
 	ptr = buf;
-	while ((tot = read(fd, ptr, sizeof(buf) - (ptr - buf))) != 0)
+	while ((tot = read(fd, ptr, sizeof(buf) - (ptr - buf) - 1)) != 0)
 		ptr += tot;
 	*ptr = '\0';
 	close(fd);