CVE-2020-16135: Add missing NULL check for ssh_buffer_new()
Add a missing NULL check for the pointer returned by ssh_buffer_new() in
Thanks to Ramin Farajpour Cami for spotting this.
Signed-off-by: Andreas Schneider <email@example.com>
Reviewed-by: Anderson Toshiyuki Sasaki <firstname.lastname@example.org>
Reviewed-by: Jakub Jelen <email@example.com>
(cherry picked from commit 533d881b0f4b24c72b35ecc97fa35d295d063e53)