makes KineticEnergy- and EnstrophyAnalyzers work

...rtualFluids_GPU/DataStructureInitializer/GridProvider.cpp

src/VirtualFluids_GPU/GPU/EnstrophyAnalyzer.cu

src/VirtualFluids_GPU/GPU/KineticEnergyAnalyzer.cu

src/VirtualFluids_GPU/LBM/Simulation.cpp