edfd989e86
The helper function `make_freestyle_edge_mark_hash()` was referring to the original mesh to determine Freestyle edge marks for individual derived mesh edges. This is no longer necessary now that derived meshes deliver CD_FREESTYLE_EDGE and CD_FREESTYLE_FACE layers of their own. The reference of the original mesh was also inappropriate since the edges coming from one of the operands of a boolean modifier don't have proper CD_ORIGINDEX values but ORIGINDEX_NONE's. Many thanks to Sergey Sharybin for patch contributions and discussions.