fix discovery of data in subfolders of data_dir

Author: Tom Reitz

lightbeam/lightbeam.py

@@ -255,9 +255,10 @@ def get_endpoints_with_data(self, filter_endpoints=None):
                         if os.path.isfile(sub_dir_item_path):
                             filename = os.path.basename(sub_dir_item)
                             extension = filename.rsplit(".", 1)[-1]
+                            filename_without_extension = filename.rsplit(".", 1)[0]
                             if (
                                 extension in self.DATA_FILE_EXTENSIONS # valid file extension
-                                and filename_without_extension in self.all_endpoints # valid endpoint
+                                and data_dir_item in self.all_endpoints # valid endpoint
                                 and data_dir_item in filter_endpoints # selected endpoint
                             ):
                                 has_data_file = True