message: LowerBound() minor tweaks
diff: @@ -1385,10 +1385,10 @@ static ImVector<ImGuiStorage::Pair>::iterator LowerBound(ImVector<ImGuiStorage::
  {
  ImVector<ImGuiStorage::Pair>::iterator first = data.begin();
  ImVector<ImGuiStorage::Pair>::iterator last = data.end();
  - int count = (int)(last - first);
  + size_t count = (size_t)(last - first);
  while (count > 0)
  {
  - int count2 = count / 2;
  + size_t count2 = count >> 1;
  ImVector<ImGuiStorage::Pair>::iterator mid = first + count2;
  if (mid->key < key)
  {
  