Log Message:
Changes 2.8.7:
* Fixed a typo to fix the build when not disabling exceptions.

Changes 2.8.6:
* Fix the build when using --enable-api-properties, --enable-api-vfuncs, or
  --enable-api-exceptions when configuring glibmm.
  When using these, the API, and any API generated by gmmproc, will be
  changed. This allows users of embedded platforms to reduce the code size of *mm
  libraries and *mm-using applications, at the small cost of losing some rarely-used
  API. Alternatives exist for that API, as show in the examples.