header change affects c++ projects

Hello,

The move of "bswap_128()" in commit 232015aeefd1c945ccfaf9744e791c5888eafcf7 breaks C++ projects. Specifically: The bswap_128() function is, without a cast, assigning a void* to a uint8_t*.

Can someone please review this commit? The message claims it is a "fix" but all I see is code copy and pasted along with a precision loss from uint128_t to uint8_t.

Thank you,
Michael