Blender Git Loki

Fix T74003: Autocomplete bug with mesh.loop_triangles. in Blender Python Console.

The collection property `loop_triangles` was given the RNA type
`MeshLoopTriangle` (the type of the collection's items), instead
of `MeshLoopTriangles` (the actual expected RNA collection/array type).

The cutest, tiniest typo mistake in RNA code, leading to some complete
non-sense... It's fairly amazing that this did not cause more severe
issues actually.