Evas textblock: clean up text_append, and possibly solve infinite loop.
Evas textblock: clean up text_append, and possibly solve infinite loop.

I removed the workaround that solved it, for this cleaner, solution that
should work.

git-svn-id: 24a995eca3b83137dd7eab3408044d7832e202f7@59802 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33

antognolli/Evas,antognolli/Evas,antognolli/Evas,antognolli/Evas