sign-file: Fix warning about BIO_reset() return value

Fix the following warning:

	scripts/sign-file.c: In function ‘main’:
	scripts/sign-file.c:188: warning: value computed is not used

whereby the result of BIO_ctrl() is cast inside of BIO_reset() to an
integer of a different size - which we're not checking but probably should.

Reported-by: James Morris <jmorris@namei.org>
Signed-off-by: David Howells <dhowells@redhat.com>

diff --git a/scripts/sign-file.c b/scripts/sign-file.c
index e9741e8..058bba3 100755 (executable)
--- a/scripts/sign-file.c
+++ b/scripts/sign-file.c
@@ -185,7 +185,7 @@ int main(int argc, char **argv)
        ERR(!b, "%s", x509_name);
        x509 = d2i_X509_bio(b, NULL); /* Binary encoded X.509 */
        if (!x509) {
-               BIO_reset(b);
+               ERR(BIO_reset(b) != 1, "%s", x509_name);
                x509 = PEM_read_bio_X509(b, NULL, NULL, NULL); /* PEM encoded X.509 */
                if (x509)
                        drain_openssl_errors();