Fixed missing definition.

felixfontein · felixfontein · commit 69393a616f07 · 2015-07-13T13:27:15.000+02:00
diff --git a/nikola/plugins/command/import_wordpress.py b/nikola/plugins/command/import_wordpress.py
@@ -459,6 +459,7 @@ def import_attachment(self, item, wordpress_namespace):
 
         additional_metadata = item.findall('{{{0}}}postmeta'.format(wordpress_namespace))
         if phpserialize and additional_metadata:
+            source_path = os.path.dirname(url)
             for element in additional_metadata:
                 meta_key = element.find('{{{0}}}meta_key'.format(wordpress_namespace))
                 if meta_key is not None and meta_key.text == '_wp_attachment_metadata':
