Javadoc correction

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/io/trunk@1005694 13f79535-47bb-0310-9956-ffa450edef68

Author: Niall Pemberton

src/main/java/org/apache/commons/io/monitor/FilesystemEntry.java

@@ -27,6 +27,7 @@
  *   <li>Exists - whether the file exists or not (see {@link File#exists()})</li>
  *   <li>Directory - whether the file is a directory or not (see {@link File#isDirectory()})</li>
  *   <li>Last Modified Date/Time (see {@link File#lastModified()})</li>
+ *   <li>Length (see {@link File#length()}) - directories treated as zero</li>
  *   <li>Children - contents of a directory (see {@link File#listFiles(java.io.FileFilter)})</li>
  * </ul>
  * <p>