fix inverted logic
fix inverted logic

Ignore-this: 4ca3c12d089f93cdfc1ee6a0edcfb080

darcs-hash:20090718052751-115f9-38e6e60b3616328e61605459bc3548e6a6c1cd3a.gz

mwu-tow/cuda,phaazon/cuda,phaazon/cuda,phaazon/cuda