changed: pass/store deck as a pointer

and remove asserts for null-ptr. preparatory step for only
having deck on root mpi process

flow/flow_ebos_gasoil.hpp

@@ -23,7 +23,7 @@
 #include <opm/parser/eclipse/EclipseState/SummaryConfig/SummaryConfig.hpp>
 
 namespace Opm {
-void flowEbosGasOilSetDeck(double setupTime, Deck &deck, EclipseState& eclState, Schedule& schedule, SummaryConfig& summaryConfig);
+void flowEbosGasOilSetDeck(double setupTime, Deck *deck, EclipseState& eclState, Schedule& schedule, SummaryConfig& summaryConfig);
 int flowEbosGasOilMain(int argc, char** argv, bool outputCout, bool outputFiles);
 }