various errors with endnote import

I was trying to do endnote imports, with the 2.x-dev release, for the sole purposes of doing import updates, instead of plain adds (current 1.x functionality).

On largeist files, I was getting various function name errors (which of course is expected in a -dev release), relating to the endnote8_characterData() function.

Anso I've made a quick patch (attached) to fix these, and the imports seems to be working again in the current 2.x-dev 10th Dec release.

Hope it can help someone else out there.