getUnload() does not return bool so cannot compare with true. (#203)
getUnload() does not return bool so cannot compare with true. (#203)

* getUnload() does not return bool so cannot compare with true.

* Use != 0 for the implicit getUnload() cast to bool

dreamworksanimation/openvdb,dreamworksanimation/openvdb,dreamworksanimation/openvdb,dreamworksanimation/openvdb