This update for openexr fixes the following issues:

Security issues fixed:

- CVE-2020-16587: Fixed a heap-based buffer overflow in chunkOffsetReconstruction in ImfMultiPartInputFile.cpp (bsc#1179879).
- CVE-2020-16588: Fixed a null pointer deference in generatePreview (bsc#1179879).
- CVE-2020-16589: Fixed a heap-based buffer overflow in writeTileData in ImfTiledOutputFile.cpp (bsc#1179879).

This update was imported from the SUSE:SLE-15:Update update project.