Ensure BricksDB is passed a string for ldraw_mode parameter.

diff --git a/bricksplom.py b/bricksplom.py
index b2bd6a4ef808b16de191cac8ca301a8a0ce2e2b9..dd08f5df8b3059798a89af64e6aa8cdadb0d6f16 100755 (executable)
--- a/bricksplom.py
+++ b/bricksplom.py
@@ -832,7 +832,7 @@ def main(
     parser.add_argument('-r', '--raw', action='store_true')
     parser.add_argument('-m', '--match-by', action='store')
     parser.add_argument('-s', '--sort-by', action='store', default=TOK_SORT_ID)
-    parser.add_argument('-l', '--ldraw', action='store')
+    parser.add_argument('-l', '--ldraw', action='store', default='')
     args = parser.parse_args()
     db = BricksDb(environ.get(NAME_ENV_DIRNAME, '.'),
                   environ.get(NAME_ENV_LDRAW, ''),