dealii/dealii — pull request #187 by agrayver (2014-10-03 18:04:50+00:00)
Title: Preallocation of PETScWrappers::MPI::SparseMatrix with off-diagonal block nonzeros.

Enable PETScWrappers::MPI::SparseMatrix interface to pass number of nonzero elements in off-diagonal blocks during matrix preallocation.