output routines (don't optimize away 0xff data before and after non
0xff data). Also, fix a bug where the data contents sometimes weren't
written out completely.
Initial bug reported by Tom Harris <TomH@optiscan.com>. Fixes
provided by Alexey V.Levdikov <tsar@kemford.com>.
git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk@330 81a1dc3b-b13d-400b-aceb-764788c761c2