Features generated on the fly (e.g. -q xx) don't have a min/max: avoid uninitialized warnings.
Merge branch 'master' of git://github.com/JohnLangford/vowpal_wabbit
Better handling of "no data. Can't compare" case:
- Give clearer indication of what happened to the user.
- Save the lenient-diff file for later inspection.
- Also: close the file descriptor when giving up.
Merge pull request #339 from arielf/master

RunTests improvement + vw-varinfo undefined var fix