[plt-scheme] fix for (sin 12345678901234567890123)

At Tue, 3 Dec 2002 04:47:12 -0500, "Anton van Straaten" wrote:
> With Microsoft's C compiler, the problem seems to be caused by use of the
> /O2 compiler option.  The c.l.s. thread and my latest message there gives
> more detail.

Thanks for tracking this down.

I've disabled MSVC optimization around uses of sin(), cos(), and tan(),
which are the only functions I find to break. (Someone let me know if I
missed one.) Yuck.

Matthew