puppetlabs/puppetlabs-mysql — pull request #172 by bodepd (2013-04-28 20:10:15+00:00)
Title: change default_engine from undef to UNSET

The templates/my.cnf.erb expects the default value for
default_engine to be UNSET (instead of undef).

Setting the default value to undef causes the value of the param
to literally default to undef which causes mysql to fail.