fix: chance of out of bounds in model317

[lesleyrs]

calling axis.g2 sometimes causes RangeError: Offset is outside the bounds of the DataView at DataView.prototype.getUint16 (<anonymous>)

317 client doesn't multiply by 6 here:

        buf0.position = header.faceTextureAxisOffset;

        for (int face = 0; face < texturedFaceCount; face++) {
            texturedVertexA[face] = buf0.readU16();
            texturedVertexB[face] = buf0.readU16();
            texturedVertexC[face] = buf0.readU16();
        }

[ultraviolet-jordan]

We should not be modifying the 225 vanilla client code in ObjType.

[lesleyrs]

Restored it