[Lightweight C++] 1.3.2 exceptions and dtors

[Stelios Xanthakis]

If the ctor throws, the dtor must not be invoked.
1.3.2 implements this for gcc-3.4 cleanups so now
programs are consistent and do the same things
compiled with gcc34cleanup or not.

The example of the new code is
http://students.ceid.upatras.gr/~sxanth/lwc/ex16.html

although I didn't manage to get a reply from
the gcc folks if this code is safe, but it seems
ok.

1.3.2 download:
http://students.ceid.upatras.gr/~sxanth/lwc/lwc-1.3.2.tar.bz2