sner nmap script http-generator lua npe

[bodik]

NSE: Starting http-generator against xxx:80.
NSE: http-generator against xxx:80 threw an error!
/usr/bin/../share/nmap/nselib/unicode.lua:34: attempt to get length of a nil value (local 'buf')
stack traceback:
	/usr/bin/../share/nmap/nselib/unicode.lua:34: in function 'unicode.decode'
	/usr/bin/../share/nmap/nselib/url.lua:226: in function 'url.parse'
	/usr/bin/../share/nmap/nselib/url.lua:281: in function 'url.absolute'
	/usr/bin/../share/nmap/nselib/http.lua:1700: in function 'http.parse_redirect'
	/usr/bin/../share/nmap/nselib/http.lua:1766: in function 'http.get'
	/usr/bin/../share/nmap/scripts/http-generator.nse:58: in function </usr/bin/../share/nmap/scripts/http-generator.nse:51>
	(...tail calls...)