The magnifier layout handles the currently focused client specially.
However, if the currently floating client is floating, it should not be
handled by the layout at all. A bug caused the magnifier layout to
handle a focused and floating client anyway if it was the only tiled
client.
Fix this by removing the '#cls > 0'-case. If #cls == 0, then no client
is available to be managed. Thus, cls[1] will be nil, which is fine
since, well, no client is available to be managed. This only made a
difference in the specific bug that I described above. Thus, drop this
case.
Fixes: https://github.com/awesomeWM/awesome/issues/2045
Signed-off-by: Uli Schlachter <psychon@znc.in>