Describe the bug
If you set a normal chart gauge with a negative angles span, the inside of the gauge fills all, it doesn't matter if the value is 1 or 20 and the max is 400. It seems like the gauge reach the max every time.
Expected behavior
I expected that works normally, like the positive angle span just in the opposite direction, instead of that it fills completely the gauge
Describe the bug If you set a normal chart gauge with a negative angles span, the inside of the gauge fills all, it doesn't matter if the value is 1 or 20 and the max is 400. It seems like the gauge reach the max every time.
To Reproduce Steps to reproduce the behavior:
Expected behavior I expected that works normally, like the positive angle span just in the opposite direction, instead of that it fills completely the gauge
Screenshots
![image](https://user-images.githubusercontent.com/49473796/82803154-522e7400-9e80-11ea-92af-43ea271e8938.png)
Demo go to the demo page and try it
ngx-charts version ngx-charts version: 13.0.2