Alpar Juttner <alpar@cs.elte.hu> [Thu, 04 Aug 2011 21:12:46 +0200] rev 423
Merge #382 to branch 1.0
Alpar Juttner <alpar@cs.elte.hu> [Tue, 02 Aug 2011 18:13:34 +0200] rev 422
Allow lgf file without Arc maps (#382)
A single '-' character in the @arcs sectio header indicates that
there is no arc map.