e_comp: set nocomp_ec NULL at _e_comp_cb_nocomp_end
e_comp: set nocomp_ec NULL at _e_comp_cb_nocomp_end

Change-Id: I678e9c90a600f8585017d37667c25696ac41c8b2

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