Type Mac GetMouseX as int __cdecl (void)
Mac body reads no args: returns the cursor X global, or -1 (SBB/NOT/OR) when the cursor-valid flag is not set; plain RET. 68 call sites use it as a coordinate. Windows twin 0x00468730 is int (void).
Changes 1, applied together
Set prototype
mac 0x000639d6signatureundefined GetMouseX(void)→int GetMouseX(void)conventionunknown→__cdecl