Fixed a lifetime bug which could cause a segfault with a destructed std::function

Signed-off-by: Nick Avramoussis <[email protected]>

Author: Idclip

openvdb/openvdb/points/PointReplicate.h

@@ -116,7 +116,7 @@ replicate(const PointDataGridT& source,
     private:
         Index mIt, mEnd, mSource;
         const Index mSourceEnd;
-        const GetIncrementCB& mCallback;
+        const GetIncrementCB mCallback;
     }; // struct CopyIter