The labels method is not returning the correct labels

```st
testLabels

	model numberOfGaussians: 2.
	model fitX: #( #( 1 2 ) #( 1 4 ) #( 1 0 ) #( 10 2 ) #( 10 4 ) #( 10 0 ) ).

	self
		assert: model labels
		equals: #( 1 1 1 0 0 0 )
```

This test is failing, it returns `#( 1 1 1 1 1 1)` instead