hg: jdk8/tl/jdk: 7116890: additional warnings fixes for java.io

[stuart.marks at oracle.com]

Changeset: 0e3f706741ca
Author:    smarks
Date:      2011-12-01 16:14 -0800
URL:       http://hg.openjdk.java.net/jdk8/tl/jdk/rev/0e3f706741ca

7116890: additional warnings fixes for java.io
Reviewed-by: alanb, smarks
Contributed-by: Sebastian Sickelmann <sebastian.sickelmann at gmx.de>

! src/share/classes/java/io/ExpiringCache.java
! src/share/classes/java/io/LineNumberInputStream.java
! src/share/classes/java/io/LineNumberReader.java
! src/share/classes/java/io/ObjectOutputStream.java
! src/share/classes/java/io/RandomAccessFile.java