fixed a failure when the lib behind a port is unknown

univscan.gs

@@ -89,9 +89,16 @@ ports.push("router")
 for port in ports
 	if port == "router" then
 		lib = getRouter(ipAddress)
+		if (lib == null) then
+			continue
+		end if
 	else
 		lib = getLib(ipAddress, port)
+		if (lib == null) then
+			continue
+		end if
 	end if
+
 	libId = lib.lib_name + "_" + lib.version
 
 	existingVulnerabilityFile = getFile(globals.vulnerabilitiesDirectoryName, libId)
@@ -107,6 +114,9 @@ for port in ports
 	end if
 	print("Scanning lib " + libId)
 	scanResults = metaxploit.scan(lib)
+	if (scanResults == null) then
+		continue
+	end if
 	// example with port 25, usefull to debug
 	//scanResults = ["0x19189A45", "0x1C021A4C", "0x5D601DE4"]
 	vulnerabilitiesMap = {}