Merge branch 'feature/cppcheck-warnings' into 'master'

dumux/common/loggingparametertree.hh

dumux/discretization/box/boxgeometryhelper.hh

dumux/discretization/facecentered/diamond/geometryhelper.hh

dumux/geometry/boundingboxtree.hh

dumux/geometry/distancefield.hh

dumux/geometry/geometricentityset.hh

dumux/material/fluidmatrixinteractions/2p/materiallaw.hh

...aterial/fluidmatrixinteractions/fluidmatrixinteraction.hh

...x/material/fluidmatrixinteractions/mp/mplinearmaterial.hh

...xinteractions/porenetwork/pore/2p/multishapelocalrules.hh

...interactions/porenetwork/pore/2p/singleshapelocalrules.hh

dumux/material/fluidstates/compositional.hh

dumux/material/fluidstates/immiscible.hh

dumux/material/fluidstates/isothermalimmiscible.hh

dumux/material/fluidstates/pressureoverlay.hh

dumux/material/fluidstates/saturationoverlay.hh

dumux/material/fluidstates/temperatureoverlay.hh

...ixinteractions/porenetwork/test_throattransmissibility.cc