Sybren A. Stüvel
46d56bd956
After copying NLA tracks from one `AnimData` to another, also ensure that the `AnimData::act_track` and `AnimData::actstrip` pointers are pointing to the copy rather than the original. This is a necessary step to allow library overrides on NLA modifiers without crashing Blender. The remapping of the pointers is done by looping over the tracks/strips and comparing pointers. Alternatively, I could update the copy functions themselves to keep track of those pointers and return them, but IMO that would produce more spaghetti (they're also used in cases where this pointer-remapping is not desired).