assimp: build failure for macOS 13

[ShadSterling (Shad Sterling)]

While reinstalling all ports after upgrading to Ventura, assimp (not requested) failed

The problem seems to be a few calls to deprecated vsprintf, e.g.

:info:build /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_assimp/assimp/work/assimp-5.2.5/code/PostProcessing/ValidateDataStructure.cpp:83:22: error: 'vsprintf' is deprecated: This function is provided for compatibility reasons only.  Due to security concerns inherent in the design of sprintf(3), it is highly recommended that you use vsnprintf(3) instead. [-Werror,-Wdeprecated-declarations]
:info:build     const int iLen = vsprintf(szBuffer, msg, args);
:info:build                      ^

[jmroot (Joshua Root)]

#66071