Bastien Montagne
a52fbfa828
Thing is, those functions always reallocate the whole keyblock's data mem, while in some cases we already have right amount of elements, so we can just copy over. Further more, `BKE_key_convert_from_offset`, despite its name, was not making any check nor allocation on keyblock's data elements! So split 'copy' operation itself in `BKE_key_update_from_...`, where no mem checks/operations are performed (only an assert). Only useful in sculpt mode currently, but will be used by fix for T35170 too.