Merge pull request #1632 from nikicc/fieature-constructor-only-metas

[FIX] OWFeatureConstructor: Fix domain check for only meta data sets

Author: janezd

Orange/widgets/data/owfeatureconstructor.py

@@ -166,7 +166,7 @@ def setEditorData(self, data, domain):
         self.setModified(False)
         self.featureChanged.emit()
         self.attrs_model[:] = ["Select Feature"]
-        if domain:
+        if domain or domain.metas:
             self.attrs_model[:] += chain(domain.attributes,
                                          domain.class_vars,
                                          domain.metas)