updated pikchr.c from https://pikchr.org/home/artifact/90493bcb588f7a7b .
This version in Fossil is not yet in sync with github.
It brings a very useful correction that allows any value for HEADING, the value is simply fmod by 360°.
This is a much more generalizable behaviour for macros that do rotations.
I hope it won't break too much code with what is already released in the various tools.

Windows executable compiled with Visual Studio 2022 and the extra flags /Ot and /MD so that pikchr.exe has no false positives with antivirus software.
Tested with VirusTotal ; out of 64 antivirus programs, only 4 flagged the executable as malware : Bkav Pro, Cynet, Rising, SecureAge

Sources forked from drhsqlite/pikchr, "html-defense" branch, nothing changed.

Executable compiled with Visual Studio 2022