let's not divide by 0.

Backport from commit 41a9e2149e7b118e73578afa7f499021f7bfb06a
on https://git.enlightenment.org/core/efl.git
eio monitors no longer trigger a CRI error during free

Backport from commit cc6eed2f86fc24cc1b5bfe978ac1aec77784b827
on https://git.enlightenment.org/core/efl.git
"whether" has 2x 'h'

Backport from commit d03ecb0f3daa43eb566030f124c96086437861d3
on https://git.enlightenment.org/core/efl.git
do not use EINA_FALSE instead of NULL

Backport from commit f8c2c574062339bfda4988a450e3f809451941e1
on https://git.enlightenment.org/core/efl.git