hg: shenandoah/jdk9/hotspot: Use original object in null-checked-write-barrier, rather than null(), fixes assert over flattened types.

[roman at kennke.org]

Changeset: f7c1587abf8c
Author:    rkennke
Date:      2016-01-25 23:49 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk9/hotspot/rev/f7c1587abf8c

Use original object in null-checked-write-barrier, rather than null(), fixes assert over flattened types.

! src/share/vm/opto/graphKit.cpp