d50ff36d3d
Added threading lock around unsafe part of do_makeDispListCurveTypes (parts which touches Curve->bev and Curve->path). Namely it means pre-tesselation modifiers, bevel, path and non-modified display list will be calculated inside a locked thread. Post-tessellation modifiers will eb calculated outside of locked thread, which means heavy constructive or deformation modifiers applying on tesselated spline will be nicely threaded. This makes it possible to use threaded object update by default in the branch, so everyone could start testing it.