Rfast::dista giving all 0 entries in 2.5.1.2


Hi,

Thanks for the amazing package. Rfast::dista gives all 0s in version 2.1.5.2. I am just using the code in the reference manual: 

```r
xnew <- as.matrix( iris[1:10, 1:4] )
x <- as.matrix( iris[-c(1:10), 1:4] )
a <- dista(xnew, x)
```

This problem persists even with a fresh installation in a new conda R environment. The function does give correct output after downgrading to 2.1.5.1.

Harry