fix for EXT-1270: Crash on shutdown in LLOcclusionQueryPool on nVidia 8600M. to be reviewed by palmer.
fix for EXT-1270: Crash on shutdown in LLOcclusionQueryPool on nVidia 8600M.
to be reviewed by palmer.

gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm