Merge pull request #1252 from seanbright/model-with-no-props

Fix NPE in JavaClientCodegen when model has no properties of its own

modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultCodegen.java

@@ -1439,6 +1439,8 @@ public class DefaultCodegen {
             }
         } else {
             m.emptyVars = true;
+            m.hasVars = false;
+            m.hasEnums = false;
         }
     }