[Opm] Build of intersectio.cpp

[Phani Narasimham]

Sir,

Very nice morning sir.

Build of intersection.cpp in cppgrid is failing with integral_constant
error.

If i write a sample .cpp file using integral_constant the compiler
succeeds and builds the executable. ( g++ sample.cpp)

I am building opm on Ubuntu 16 and gcc 8.04

Where as building opm with make fails at intersection.cpp that
integral_constant not known.

-- 
Thanks,
M.V.S Phani Narasimham
9490793045