Only BlendShape pointIndices use uint arrays?

[AlexSchwank]

Description of Issue

In the BlendShape schema the pointIndices attribute is using a uint array:

class BlendShape "BlendShape" (//...)
{
    // ...
    uniform uint[] pointIndices (
    // ...
}

(see https://github.com/PixarAnimationStudios/USD/blob/master/pxr/usd/lib/usdSkel/schema.usda#L282)

All other indices attributes like faceVertexIndices and creaseIndices are using int arrays. Is there are reason for that?

Package Versions

19.05

[jilliene]

Filed as internal issue #USD-5341