Fix property name.

debexpo/plugins/native.py

@@ -87,7 +87,7 @@ class NativePlugin(QAPlugin):
             log.debug('Package is not native')
             result['severity'] = constants.PLUGIN_SEVERITY_INFO
 
-        result.native = is_native
+        result.is_native = is_native
 
 plugin = NativePlugin
 models = [