Fix explicit cast required

This is required for PyTorch which runs into an issue with narrowing types. Requires an explicit cast.

[ROCm/hip commit: 4ddb81424f]

projects/hip/include/hip/hcc_detail/hip_vector_types.h

@@ -123,7 +123,7 @@ THE SOFTWARE.
             typename std::enable_if<
                 (rank > 1) && sizeof...(Us) == rank>::type* = nullptr>
         __host__ __device__
-        HIP_vector_type(Us... xs) noexcept { data = Native_vec_{xs...}; }
+        HIP_vector_type(Us... xs) noexcept { data = Native_vec_{static_cast<T>(xs)...}; }
         __host__ __device__
         HIP_vector_type(const HIP_vector_type&) = default;
         __host__ __device__