dealii/dealii — pull request #198 by tjhei (2014-10-14 20:25:49+00:00)
Title: PETSc and Trilinos vectors with ghost entries can now be reset to zero using = 0.0

It has been annoying a couple of times in the past that we did not allow to (re)set a ghosted vector to 0 by
v = 0.0;
This is now possible.