Unclear with all the flip operations if there is some kind of attachment
(exchange of channels), the other 2 channels created in the function
are also cleaned up.
This commit makes the code (mostly) C99-compatible, enabling to compile
it without the -Wno-error=implicit-function-declaration flag. This
way, Magic becomes usable on arm64 architectures, specifically on Apple
computers with M1/M2 SoC.
the compiler. Some are obscure functions (plot verstatec hasn't
been used in years) but others (like SPICE distributed junctions)
are potentially significant sources of unexpected crashes on
systems that don't zero uninitialized memory.
Darryl L. Miles
Alessandro De Laurenzis
Tim Edwards