Crashing when exporting certain MQO files

[Omar Assadi]

System Information

• OS: Windows 10 Education x86_64 (build: 19041.685)
• Blender version: 2.91
• Add-on version: latest version of the master branch (commit ae79211)
• Metasequoia version: 4.75a

Description about the bug

Upon exporting certain Metaseq projects prepared for RuneScape NPCs, Blender crashes immediately. Unlike in issue #4, this one at least does import properly.

Additional comments

Example MQO file: https://yadi.sk/d/xSiqWp7RK_4K1w

Crash log: https://gist.github.com/54/b8d6c11dd39979d4572f6a0e8eb53dc2

Also, happy new year 😉

[nutti]

This issue has already fixed by solving #4.