This reverts commit 72646ac4.

Found via `codespell -q 3`

My clang doesn't like the macro defined this way, choking at the callsite on line 195 with "too many arguments provided to function-like macro invocation"

This change matches what is done for STBTT_memset in stb_truetype.h

tweak license reference wording

Slightly modify the public domain license to keep it in the public domain, but make it clear that even when dedications might not be recognized that the code is still usable.  Given that this isn't dual-licensing under a different license, I'm hoping this will be acceptable.

Slightly modify the public domain license to keep it in the public domain, but make it clear that even when dedications might not be recognized that the code is still usable.  Given that this isn't dual-licensing under a different license, I'm hoping this will be acceptable.