When both height and width arguments are provided to the function
new() there is a check to see if one of them was a screen percentage,
and is expected to be a string. If the user provided absolute pixels,
and argument is of type number awesome will crash. Now tostring is
used to sanitize the arguments during this check.
Signed-off-by: Adrian C. (anrxc) <anrxc@sysphere.org>
Signed-off-by: Julien Danjou <julien@danjou.info>