Move the three current 'status variables' (stop, update and progress)
into a single 'WorkerStatus' struct. This is cleaner and will allow for
future workin this area without having to edit tens of 'startjob'
callbacks signatures all the time.
No functional change expected here.
Note: jobs' specific internal code has been modified as little as
possible, in many cases the job's own data still just store pointers to
these three values. Ideally in the future more refactor will be using a
single pointer to the shared `wmJobWorkerStatus` data instead.
Pull Request: https://projects.blender.org/blender/blender/pulls/113343
Ensure the string isn't null terminated before len, if this happens
it's likely an error calculating the length argument. Since the length
is passed to memcpy it could result in reading outside `str` bounds.
There was one case where the string was duplicated then grew by 1 byte
afterwards. Replace this with an allocation since it's an uncommon
operation, not especially useful to support.
