Render model not extracted correctly.

[num0005]

Copied from #10

• Mesh itself is fine but weights and/or node indexes in the parts tag block aren't filled in properly. This means rigged models have to be remade since their weights are missing.

• Some models can be missing everything after the section tag block entirely such as the grunt which means they are just an empty render_model file with no mesh data. Seems to be fixed by 0600328

• If the render_model has PRT_info then this needs to be cleared as it will cause a crash on load. The crash in H2Sapien is because the render_model is missing the PRT specific shaders but I have no idea what state it would be after this. Crash was actually caused by post processing on the mesh. Fixed by 26f718a

• Render models made with the DAE converter don't seem to get their raw vertices tag block written.

[General-101]

• Render models made with the DAE converter don't seem to get their raw vertices tag block written. This is because the DAEConverter doesn't fill in the section info block.

[General-101]

• Some models can be missing everything after the section tag block entirely such as the grunt which means they are just an empty render_model file with no mesh data. Seems to be fixed by 0600328
  for resource map related issues. There are other rare cases where a tag can be missing it's mesh data. See invisible_box1x2x2 in 06a_sentinelwalls.map as an example.