Function input_savefilepopup

src/lua-engine.cpp:5709–5712

	return doOpenFilePopup(L, false);
}
static int input_savefilepopup(lua_State *L)
{
	return doOpenFilePopup(L, true);
}

// the following bit operations are ported from LuaBitOp 1.0.1,
// because it can handle the sign bit (bit 31) correctly.