CUDA compile error

[ibaned]

Not quite sure what introduced this, but its fairly recent:

/home/daibane/src/Trilinos/kokkos/core/src/Kokkos_View.hpp(1223): warning: calling a __host__ function from a __host__ __device__ function is not allowed
          detected during:
            instantiation of "void Kokkos::View<DataType, Properties...>::assign_data(Kokkos::View<DataType, Properties...>::pointer_type) [with DataType=int ***, Properties=<Kokkos::Serial::array_layout, Kokkos::Device<Kokkos::HostSpace::execution_space, Kokkos::HostSpace::memory_space>, Kokkos::MemoryManaged>]" 
/home/daibane/src/Trilinos/kokkos/core/unit_test/TestViewSubview.hpp(1310): here
            instantiation of "void TestViewSubview::TestUnmanagedSubviewReset<Space>::operator()(int) const [with Space=Kokkos::Serial]" 
/home/daibane/src/Trilinos/kokkos/core/src/Kokkos_Serial.hpp(383): here
            instantiation of "std::enable_if<std::is_same<TagType, void>::value, void>::type Kokkos::Impl::ParallelFor<FunctorType, Kokkos::RangePolicy<Traits...>, Kokkos::Serial>::exec<TagType>() const [with FunctorType=TestViewSubview::TestUnmanagedSubviewReset<Kokkos::Serial>, Traits=<Kokkos::Serial::execution_space>, TagType=void]" 
/home/daibane/src/Trilinos/kokkos/core/src/Kokkos_Serial.hpp(402): here
            instantiation of "void Kokkos::Impl::ParallelFor<FunctorType, Kokkos::RangePolicy<Traits...>, Kokkos::Serial>::execute() const [with FunctorType=TestViewSubview::TestUnmanagedSubviewReset<Kokkos::Serial>, Traits=<Kokkos::Serial::execution_space>]" 
/home/daibane/src/Trilinos/kokkos/core/src/Kokkos_Parallel.hpp(191): here
            instantiation of "void Kokkos::parallel_for(const ExecPolicy &, const FunctorType &, const std::string &, Kokkos::Impl::enable_if<<expression>, void>::type *) [with ExecPolicy=Kokkos::RangePolicy<Kokkos::Serial::execution_space>, FunctorType=TestViewSubview::TestUnmanagedSubviewReset<Kokkos::Serial>]" 
/home/daibane/src/Trilinos/kokkos/core/unit_test/TestViewSubview.hpp(1328): here
            instantiation of "void TestViewSubview::test_unmanaged_subview_reset<Space>() [with Space=Kokkos::Serial]" 
/home/daibane/src/Trilinos/kokkos/core/unit_test/serial/TestSerial_SubView_c13.cpp(51): here

I have a fix and will put up a PR in a second