Wrong output of terminal::rows() when --size: 1.2

[jcubic]

Issue summary

The calculation of number of rows is wrong when using --size: 1.2

Expected behavior

Number of rows in less should always be the same when using --rows

Actual behavior

It sometimes returns wrong value (off by one)

Steps to reproduce

1. Open demo https://codepen.io/jcubic/pen/dyxbJQN?editors=0111
2. type rows command
3. the css have --rows: 15 it returns 14 with --size: 1 or --size: 1.3 it works fine

Browser and OS

Additional notes

this is a problem when using outputLimit: 0 or with terminal::less()