fix fail with condition

Author: firefart

modules/exploits/windows/iis/iis_webdav_scstoragepathfromurl.rb

@@ -122,7 +122,7 @@ def exploit
       },
       'uri' => target_uri.path
     )
-    fail_with(Failure::BadConfig, "Server does not respond to WebDAV request") unless res || res.code != 207
+    fail_with(Failure::BadConfig, "Server did not respond correctly to WebDAV request") if(res.nil? || res.code != 207)
 
     xml = res.get_xml_document
     url = URI.parse(xml.at("//a:response//a:href").text)
@@ -157,7 +157,7 @@ def exploit
           'uri' => target_uri.path
         )
         if res
-          vprint_status("Server returned #{res.code}")
+          vprint_status("Server returned status #{res.code}")
           if res.code == 502 || res.code == 400
             next
           elsif session_created?