Blender Git Loki

creator.c wasn't updated in my last commit, here it is (the change reverts my previous change to it, since it was made unnecessary by handling onload scriptlinks a little differently, as can be checked in blender.c and editscreen.c).

- BPython: finishing object and nmesh .setMaterials commit, fixing two bugs. Also fixed a crash with object.track (pointer wasn't checked for validity). All based on reports and patch by Yann Vernier, thanks again.