Extra data links cannot be null in Gamebryo meshes

Issue Description

OpenMW crashes when attempting to load cells from my heavily modded Oblivion setup with hundreds of mods. I don't remember what mods I had installed, and I'm not entirely sure I can check anymore? I'll try to if required though!

Steps to Reproduce

Can't really reproduce it unless I give you my entire 52GB Oblivion data folder

System Information

  • OpenMW Version: OpenMW development (87da40e6)
  • Operating System & Version: EndeavourOS
  • GPU: Radeon RX 5700 XT
  • Morrowind Version: Steam
  • Language: English
  • Addons: Oblivion, Shivering Isles, Vile Lair, Thieves Den, Mehrunes Razor, Frostcrag, Battlehorn Castle, Orrery, Horse Armor

Mods

  • Are you using mods? hundreds
  • Are you using any shader mods? Yes
  • Does it happen in a clean vanilla install? N/A

Logs and Settings

openmw.cfg openmw.log openmw-crash.log