Mac MAINMENU_ResetSelectedCharGameState: void __cdecl (void)
The Mac body has no argument reads: it stores 0 into one global and does a plain RET (EAX is only the PIC base). Its address is taken in MAINMENU_RunFrontEnd (LEA at 0x002c8b00) and passed as [ESP] to the callback registrar 0x0004a5dd, a no-argument callback slot. There is no Windows symbol with this name; the prototype follows the body.
Changes 1, applied together
Set prototype
mac 0x002c7a8esignatureundefined MAINMENU_ResetSelectedCharGameState(void)→void MAINMENU_ResetSelectedCharGameState(void)conventionunknown→__cdecl