pki: Make sure sig is not used unintialized.

BUG: https://red.libssh.org/issues/167

Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
(cherry picked from commit 9a7d450098a4fc45ae3f0eb194218c51b133b3f9)

1 files changed, 1 insertions, 1 deletions

diff --git a/src/pki.c b/src/pki.c
index bbda1555..82b74cfa 100644
--- a/src/pki.c
+++ b/src/pki.c
@@ -1365,7 +1365,7 @@ ssh_string ssh_pki_do_sign(ssh_session session,
     struct ssh_crypto_struct *crypto =
         session->current_crypto ? session->current_crypto :
                                   session->next_crypto;
-    ssh_signature sig;
+    ssh_signature sig = NULL;
     ssh_string sig_blob;
     ssh_string session_id;
     int rc;