[plt-scheme] 3m problems on FreeBSD-7

> There is also a problem with src/mred/wx_keym.cxx being fed through
> xform, namely
> 
> Error [ASSIGN] 522 in ../../../trunk/src/mred/gc2/../wxme/wx_keym.cxx:
> suspicious assignment with a function call, LHS ends "["
> Error [ASSIGN] 516 in ../../../trunk/src/mred/gc2/../wxme/wx_keym.cxx:
> suspicious assignment with a function call, LHS ends "["
> 
> This is due to gcc 4.2 generating different output with g++ -E than
> gcc 3.4. This can be worked around by the attached following patch,
> but a real fix probably needs to be done in xform.ss.

I agree that it would be better to improve "xform.ss", but I've
committed your patch for now.

Thanks!
Matthew