reverted to inherit from the proper base class, as the crash was only due to miscompilation
reverted to inherit from the proper base class, as the crash was only due to miscompilation

[git-p4: depot-paths = "//sw/gpgpu/nvbio/main/": change = 18501036]

kimrutherford/nvbio,kimrutherford/nvbio,kimrutherford/nvbio,kimrutherford/nvbio,NVlabs/nvbio,NVlabs/nvbio,NVlabs/nvbio,NVlabs/nvbio