[petsc-dev] MatGetBlockSize[s]() before prellocation

[Lisandro Dalcin]

Currently, MatGetBlockSize[s]() fails before matrix preallocation
because of the check MatCheckPreallocated(mat,1). Are there any
objections to remove that check?

The rationale is to follow MatGet[Local]Size(), these calls do not
fail before preallocation, why should MatGetBlockSize[s]()?. In
petsc4py, I do need to query the block sizes before preallocation to
do sanity checks on the arrays users pass for preallocating the
matrix.

-- 
Lisandro Dalcin
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