message: Updated profile_buffer.h
  Fixed the warning in the file
diff: @@ -128,7 +128,7 @@ class ProfileBuffer {
  // Returns the profile event at the given index. If the index is invalid a
  // nullptr is returned. The return event may get overwritten if more events
  // are added to buffer.
  - const struct ProfileEvent* const At(int index) const {
  + const struct ProfileEvent* const At(size_t index) const {
  size_t size = Size();
  if (index >= size) {
  return nullptr;
  