[petsc-dev] Negative blocksize

[Jed Brown]

"Smith, Barry F. via petsc-dev" <petsc-dev at mcs.anl.gov> writes:

>   It seems reasonable at SetUp time to make it 1. If we need to have the information that user never set it (I don't know why we would want this) then that can go into a new flag.

I think I recall code paths in which the blocksize is set after
PetscLayoutSetUp, and allowed so long as it's compatible with the sizes.
It's possible that those are no longer relevant.