Fix crash on absence of -p.

diff --git a/src/bookmaker/misc.py b/src/bookmaker/misc.py
index 4886a6bc6500f92ba2a853e86806dc02e198f96e..bcd4c9c2c8e83aebcd1ab1751140995bcaa77621 100755 (executable)
--- a/src/bookmaker/misc.py
+++ b/src/bookmaker/misc.py
@@ -447,6 +447,7 @@ def parse_args(
                         '--page_range',
                         type=PageRange,
                         action='append',
+                        default=[],
                         help=(f'page range, e.g. "2-9" or "3-{_TOK_RANGE_END}"'
                               f'or "{_TOK_RANGE_START}-14"'))
     parser.add_argument('-c',