errbit/errbit — pull request #180 by wesgarrison (2012-05-16 05:31:02+00:00)
Title: Prevent rake 0.9.2.2 from failing when clearing default task

rake 0.9.2 would (apparently) wouldn't fail if you tried to clear
a task that wasn't defined.

This closes issue #179 where trying to run the db:seed rake task
would fail with the error Don't know how to build task 'default'

Tested on ruby-1.9.2-p290 and ruby-1.9.3-p125 only, rake 0.9.2.2