Issue #12: Adjust instance id when deleting.

Fixes #12.

Author: laryn

conditional_fields.module

@@ -1532,11 +1532,12 @@ function conditional_fields_dependency_delete($dependency_ids) {
  * Delete any dependency associated with the deleted instance.
  */
 function conditional_fields_field_delete_instance($instance) {
+  $id = $instance['entity_type'] . '.' . $instance['bundle'] . '.' . $instance['field_name'];
   db_delete('conditional_fields')
     ->condition(
       db_or()
-        ->condition('dependee', $instance['id'])
-        ->condition('dependent', $instance['id']))
+        ->condition('dependee', $id)
+        ->condition('dependent', $id))
     ->execute();
 }