message: Use 64-bit indices when limits are 64 bit
diff: @@ -58,9 +58,9 @@ inline matrix<N, M, T> matrix<N, M, T>::identity()
  matrix<N, M, T> result;
  - for (int i = 0; i < N; ++i)
  + for (size_t i = 0; i < N; ++i)
  {
  - for (int j = 0; j < M; ++j)
  + for (size_t j = 0; j < M; ++j)
  {
  result(i, j) = i == j ? T(1.0) : T(0.0);
  }
  