OPM/dune-cornerpoint — pull request #70 by blattms (2014-02-17 10:29:20+00:00)
Title: [bugfix] Initializes global_grid pointer of UnstructuredGrid

Previously access global_grid of the UnstructuredGrid returned by
c_grid() was erroneous. This patch fixes this by simply reseting the
pointer of UnstructuredGrid::global_cell to CpGrid::global_cell.
Note that we silently assume that the template parameter Grid is a
CpGrid!

Closes issue #69