Decrease ec's ref_count also before decreasing cw->animating.
Decrease ec's ref_count also before decreasing cw->animating.

   When we increase cw->animating, we always increase the ec's
   ref_count. So we need to decrease ec's ref_count wherever
   decreasing cw->animating.

Change-Id: Id43e5ccee6d04ee0e7df854a807b10a5459f2a41

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