Fix potential vulnerable cloned function#475

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npt-1707 wants to merge 1 commit intoPOV-Ray:masterfrom

npt-1707:fix_CVE-2021-20299

Commits on May 7, 2025

libraries/openexr/IlmImf/ImfMultiPartInputFile.cpp: add sanity check for reading multipart files with no parts
npt-1707
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