Merge pull request #69 from amarzavery/sway4

additionalProperties not set to false if the object has empty properties or does not have properties

lib/specResolver.js

@@ -329,7 +329,7 @@ class SpecResolver {
     modelNames.forEach(function iterator(modelName) {
       let model = definitions[modelName];
       if (model) {
-        if (!model.additionalProperties || force) {
+        if (force || (!model.additionalProperties && (!(!model.properties || (model.properties && Object.keys(model.properties).length === 0))))) {
           model.additionalProperties = false;
         }
       }