fixes su/ssh with null prompt
@ -335,7 +335,7 @@ class Connection(object):
"sudo", "Sorry, try again.")
if sudo_errput.strip().endswith("%s%s" % (prompt, incorrect_password)):
raise errors.AnsibleError('Incorrect sudo password')
elif sudo_errput.endswith(prompt):
elif prompt and sudo_errput.endswith(prompt):
stdin.write(self.runner.sudo_pass + '\n')
if p.stdout in rfd: