Describe the issue
In NumPy 2, numpy_num_face_vertices() are wrong on some mixed-arity meshes.

It's not clear whether this is related to #401 which describes a different problem with different arrays with NumPy 2, or to #400 which describes a different problem with this array in NumPy 1.21.1.

To Reproduce

from tinyobjloader import ObjReader, ObjReaderConfig

reader = ObjReader()
config = ObjReaderConfig()
config.triangulate = False
reader.ParseFromString(mesh_string, "", config)

Load the following mesh:

v 0 1 1
v 0 2 2
v 0 3 3
v 0 4 4
v 0 5 5
f 1 2 3 4
f 1 4 5

Expected behavior

Observed:

(Pdb) reader.GetShapes()[0].mesh.num_face_vertices
[4, 3]
(Pdb) reader.GetShapes()[0].mesh.numpy_num_face_vertices()
array([4, 4], dtype=uint8)

Expected:

(Pdb) reader.GetShapes()[0].mesh.numpy_num_face_vertices()
array([4, 3], dtype=uint8)

Environment

• TinyObjLoader version 2.0.0rc12
• OS: Linux and Mac
• Compiler Wheels from PyPI
• Other environment Python 3.11 or 3.12, NumPy 2.4.2