Fix crash when click on unconfigured key

diff --git a/music_sampler/key.py b/music_sampler/key.py
index 983c5a6c263e064209f0a20601d4e750058d497f..ce2f45bafd8bf9ca9cbdf47c48070eb99615e4cb 100644 (file)
--- a/music_sampler/key.py
+++ b/music_sampler/key.py
@@ -290,8 +290,9 @@ class Key(ButtonBehavior, Widget):
     # Helpers
     @property
     def repeat_delay(self):
-         if 'repeat_delay' in self.key.config['properties']:
-             return self.key.config['properties']['repeat_delay']
+         if hasattr(self, 'config') and\
+                 'repeat_delay' in self.config['properties']:
+             return self.config['properties']['repeat_delay']
          else:
              return 0