hg: jdk7/tl/langtools: 6931482: minor findbugs fixes

[jonathan . gibbons]

Changeset: 6e1e2738c530
Author:    jjg
Date:      2010-03-02 16:40 -0800
URL:       http://hg.openjdk.java.net/jdk7/tl/langtools/rev/6e1e2738c530

6931482: minor findbugs fixes
Reviewed-by: darcy

! src/share/classes/com/sun/tools/classfile/ConstantPool.java
! src/share/classes/com/sun/tools/javadoc/DocEnv.java
! src/share/classes/com/sun/tools/javadoc/SeeTagImpl.java