This makes it a compile-time error to call a function that semantically
takes no parameters with a nonzero number of arguments.
Previously, such code would still compile, but risk blowing up the stack
if a compiler chose to use something other than caller-cleanup calling
conventions.
Previously, main.c would segfault at runtime if clipboards were disabled
via cmake flags, as the clipboards array would be empty but still
indexed during initialization.
Co-authored-by: Quantum <quantum2048@gmail.com>
