MFH: r458136

math/coinmp: unbreak build with Clang 6 (C++14 by default)

ClpModel.cpp:3848:24: error: reinterpret_cast from 'nullptr_t' to 'const char *' is not allowed

reinterpret_cast<const char*> (NULL) /*integrality*/,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

OsiClpSolverInterface.cpp:1451:50: error: reinterpret_cast from 'nullptr_t' to 'int *' is not allowed

messagesPointer->setDetailMessages(100,10000,reinterpret_cast<int *> (NULL));
                                             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

In file included from CglLandPSimplex.cpp:11:
In file included from ./CglLandPSimplex.hpp:31:
./CglLandPUtils.hpp:88:25: error: reinterpret_cast from 'nullptr_t' to 'OsiRowCut *' is not allowed

cuts_.resize(i, reinterpret_cast<OsiRowCut *> (NULL));
                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

CbcModel.cpp:5322:41: error: reinterpret_cast from 'nullptr_t' to 'double *' is not allowed

clpSolver->setFakeObjective(reinterpret_cast<double *> (NULL));
                            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Reported by: antoine (via bug 224669)
Approved by: ports-secteam blanket