hg: jdk6/jdk6/hotspot: 6879689: Fix warning about ignored return value when compiling with -O2

[ahughes at redhat.com]

Changeset: 6ee696377676
Author:    andrew
Date:      2009-09-08 09:01 +0100
URL:       http://hg.openjdk.java.net/jdk6/jdk6/hotspot/rev/6ee696377676

6879689: Fix warning about ignored return value when compiling with -O2
Summary: Store the return value of fwrite and check it matches the size of the array.
Reviewed-by: twisti, dholmes

! src/share/vm/adlc/archDesc.cpp