Addon hangs Blender when importing a zero point dummy mesh

[bitinn]

Example:

• https://ambientcg.com/view?id=PavingStones115A
• Download and rename as usdz

Likely cause:

def Mesh "ambientCG_Dummy_Delete_Me"
{
    int[] faceVertexCounts = []
    int[] faceVertexIndices = []
    rel material:binding = </ambientCG_Material_PavingStones115A_1K_JPG>
    point3f[] points = []
    texCoord2f[] primvars:st = []
}

Example that doesn't hang:

• https://ambientcg.com/view?id=Ground049A