e_comp_object: refresh e_pixmap if it's cleared before renderring
e_comp_object: refresh e_pixmap if it's cleared before renderring

   See f124f1bf, cae58cea.

Change-Id: I90328d5ed28198c0ae248c1606aee0392934d8df

tizenorg/platform.upstream.enlightenment,tizenorg/platform.upstream.enlightenment,tizenorg/platform.upstream.enlightenment