Fix status.format error in smb scripts

[vanjo9800]

Remove local declaration of status variable that shadows the global one inside the loop and therefore an invalid parameter is passed to get_status_name() in smb.lua.

[nnposter]

I have committed your fix as r37730 with a slight modification: You have forgotten to remove the string.unpack operation from the line where you declare the additional variables.

Thank you for contributing to nmap by identifying the issue and the root cause!