New comment by unspecd on void-packages repository

https://github.com/void-linux/void-packages/pull/27320#issuecomment-799243391

Comment:
The bug is in function `scm_floor_divide` in `libguile/numbers.c`:
```c
void
scm_floor_divide (SCM x, SCM y, SCM *qp, SCM *rp)
```

On x86_64:
```console
$ guile3
scheme@(guile-user)> (floor/ 130.0 10/7)
$1 = 91.0
$2 = 0.0
```

On i686:
```console
$ guile3
scheme@(guile-user)> (floor/ 130.0 10/7)
$1 = 90.0
$2 = 1.4285714285714257
```