Decoder: Fix initialization of ps_next_dpb during reference list creation am: 54cbe1b29b am: a13436200c am: e057ae1738 am: 5fc3db621b am: 31e1ffeacb am: 53b01d5b00 am: d1dce9bafb
am: 5a2732bb3f

Change-Id: I8805f8e1fb95077c8cc63b9c3345618eab8c7887