message: Fix warning of unused results
diff: @@ -186,7 +186,8 @@ inline void __host__ __device__ throw_on_error(hipError_t status, char const* ms
  #if __THRUST_HAS_HIPRT__
  // Clear the global HIP error state which may have been set by the last
  // call. Otherwise, errors may "leak" to unrelated kernel launches.
  - hipGetLastError();
  + hipError_t clear_error_status = hipGetLastError();
  + THRUST_UNUSED_VAR(clear_error_status);
  #endif
  if(hipSuccess != status)
  @@ -218,7 +219,8 @@ inline void __host__ __device__ throw_on_error(hipError_t status)
  #if __THRUST_HAS_HIPRT__
  // Clear the global HIP error state which may have been set by the last
  // call. Otherwise, errors may "leak" to unrelated kernel launches.
  - hipGetLastError();
  + hipError_t clear_error_status = hipGetLastError();
  + THRUST_UNUSED_VAR(clear_error_status);
  #endif
  if(hipSuccess != status)
  