id_wrap() failed to cleanup the big array it has allocated if it encounters
error. Added code so that it frees the big array when it has encountered
errors.

Also added code so that Windows platform do not run the id_wrap test for
now.  Needed to make a pre1 release for users to try out the 1.8.14
pre-release code.

Tested: Jam with reduced memory via "limit vmemoryuse 800M".