description: issue: - https://github.com/assimp/assimp/blob/4ad1d2aa3086517816716a50aa122342806736f9/code/AssetLib/CSM/CSMLoader.cpp#L274C1-L275C1 - sometimes the code tried to construct a new 4x4 matrix from a nullptr, thus reading out of bounds fix: - added nullptr check - added array count check - added default fallback init to identity matrix Co-authored-by: Vinz Spring <vinzs@amazon.de> Co-authored-by: Kim Kulling <kimkulling@users.noreply.github.com>