When an area is split in two, for example horizontally, one of the windows
should have height math.floor(previous height / 2) and the other
math.ceil(previous height / 2), to be certain that no gaps are left between the
windows.
For instance, if the first window has height h and the second window has height
math.floor(h / 2), the height of the third window should be math.ceil(h / 2)
instead of the same as for the second window.
So to compute the size of window n + 1 it’s necessary to remember the size of
window n - 1 as well as that of window n.
Signed-off-by: Fabienne Ducroquet <fabiduc@gmail.com>
Signed-off-by: Uli Schlachter <psychon@znc.in>
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