Initialize variable

Ignore-this: a0640f6eebe8f47c441cf506308fbf9f

darcs-hash:20120910090213-56b4d-5c7904bb390057dade6c4ffb4ca2bbadddde6ec7
Raised core revision

Ignore-this: 95e79d7919a513d58087c1ed0dfd2baa

darcs-hash:20120910090713-56b4d-413bd811f9f5f5ab9b6161e7e2c61ca23fbf1dde