Merge pull request #147 from frmdstryr/master

fixed get_step_form() checking for instance when it should be checking for class

xadmin/plugins/wizard.py

@@ -122,7 +122,7 @@ def get_step_form(self, step=None):
                     return callback(self)
                 elif hasattr(self.admin_view, str(callback)):
                     return getattr(self.admin_view, str(callback))(self)
-        elif isinstance(attrs, forms.BaseForm):
+        elif issubclass(attrs, forms.BaseForm):
             return attrs
         return None