terminal_printf started its variable arguments into a char *, which is
what va_list is on the Xbox, 32-bit x86 and Apple silicon, but not on
x86-64, where va_list is a one-element array of a register-save
structure. On an Intel Mac (or under Rosetta) va_start wrote through an
uninitialised pointer and vsnprintf read garbage, so the first terminal
line printed with arguments crashed the game.
Choosing an empty profile slot is such a line: "player profile begin
editing" fails, as it does on the Xbox, and console_warning reports it
through terminal_printf, so setting up a profile crashed on Intel Macs.
(cherry picked from commit 024e41b8cb1553d7ad9b96233860848d49e5ad13)
Milenko
7ac5978158