Table without border and header truncates last line

[testinfected]

Describe the bug
A table which as no border and no header will truncate its last line. In this case the table height is miscalculated.

Additional context
For instance a table with no header and a single line shows nothing.

func (t *Table) computeHeight() int {
	hasHeaders := t.headers != nil && len(t.headers) > 0
	return sum(t.heights) - 1 + btoi(hasHeaders) +
		btoi(t.borderTop) + btoi(t.borderBottom) +
		btoi(t.borderHeader) + t.data.Rows()*btoi(t.borderRow)
}

t.heights in this case is 1 so we end up with a total height of 0. It works with a header because the header height is accounted for twice: once in t.heights and once again with btoi(hasHeaders).
The -1 is the culprit here I guess