The volume in cells with pore volume less than the minpv threshold is
removed if minpvMode is ECLStd while it is added to the underlying cell
if minpvMode is OpmFil
Model 2 partly uses PORO=0.0 to signal inactive cells. This PR
prevents such cells from causing unwanted zcorn modifications in
the current min-pv algoritm. (The problem is however more general as
zero PORO or NTG should kill a cell whether MINPV is active or not,
refer kw ACTNUM.)
The non-template class MinpvProcessor contains all function
definitions inside of the header file without inlining. The
results in the symbols being in the library of opm-core and
in case of using CpGrid an addtional occurence in other
libraries (opm-autodiff?).
This commit changes this by simply inlining all these functions.
Note that another (better?) option would be to move at least
the bigger once into a cpp file.
