How to read point clouds with infinite point values?

### Checklist

- [x] I have searched for [similar issues](https://github.com/isl-org/Open3D/issues).
- [X] For Python issues, I have tested with the [latest development wheel](http://www.open3d.org/docs/latest/getting_started.html#development-version-pip).
- [X] I have checked the [release documentation](http://www.open3d.org/docs/release/) and the [latest documentation](http://www.open3d.org/docs/latest/) (for `master` branch).

### My Question

Hello all,

i have a bunch of point clouds which i want to process further with Open3d (Python 0.16.1). All of them contain infinite points, which I dont care about beeing removed. I tried to read them with [read_point_cloud](http://www.open3d.org/docs/latest/python_api/open3d.io.read_point_cloud.html#open3d.io.read_point_cloud):
`open3d.io.read_point_cloud(filename, remove_nan_points=True, remove_infinite_points=True)`

But this doesn't work how i would expect. I get this error:

> RPly: Error reading 'x' of 'vertex' number 0
[Open3D WARNING] Read PLY failed: unable to read file: filename

My file looks like this:
```
ply
format ascii 1.0
element vertex 2073600
property float x
property float y
property float z
property uchar red
property uchar green
property uchar blue
end_header
-inf -inf inf 1 1 1
-inf -inf inf 0 0 0
...
```

How can i read this files using Open3D?

Thanks in Advance