Fix lilypond-book in Windows

diff --git a/python/lilylib.py b/python/lilylib.py
index c3eb98bc6fda38f815b5bc9ebf8d41f91dd46a85..c83ac7dacb0ef09bf724a402638f9334b788ca92 100644 (file)
--- a/python/lilylib.py
+++ b/python/lilylib.py
@@ -189,6 +189,7 @@ def ossystem_system (cmd,
                      ignore_error=False,
                      progress_p=True,
                      be_verbose=False,
+                     redirect_output=False,
                      log_file=None):