test name if it's still null, default node.js (#130)

The new test for versions for 'nw' doesn't have a default case if versions is an object, but does not have 'nw'

Author: d3x0r

platform.js

@@ -768,7 +768,8 @@
               name = 'NW.js';
               version = data.versions.nw;
             }
-          } else {
+          } 
+          if (!name) {
             name = 'Node.js';
             arch = data.arch;
             os = data.platform;