BF [ 1748346 ] NPE on locator fields that are not mandatory

http://sourceforge.net/tracker/index.php?func=detail&aid=1748346&group_id=176962&atid=879332

* fixed javadoc

looks/src/org/compiere/util/Util.java

@@ -30,6 +30,8 @@ import javax.swing.*;
  *
  *  @author     Jorg Janke
  *  @version    $Id: Util.java,v 1.3 2006/07/30 00:52:23 jjanke Exp $
+ *  
+ *  @author     Teo Sarca, SC ARHIPAC SERVICE SRL - BF [ 1748346 ]
  */
 public class Util
 {
@@ -122,6 +124,7 @@ public class Util
 	 * CR is not masked
 	 * @param content content
 	 * @return masked content
+	 * @see #maskHTML(String, boolean)
 	 */
 	public static String maskHTML (String content)
 	{
@@ -133,12 +136,13 @@ public class Util
 	 * i.e. replace characters with &values;
 	 * @param content content
 	 * @param maskCR convert CR into <br>
-	 * 	@return masked content
+	 * @return masked content or null if the <code>content</code> is null
 	 */
 	public static String maskHTML (String content, boolean maskCR)
 	{
-		//if (content == null || content.length() == 0 || content.equals(" "))
-			//return "&nbsp";
+		// If the content is null, then return null - teo_sarca [ 1748346 ]
+		if (content == null)
+			return content;
 		//
 		StringBuffer out = new StringBuffer();
 		char[] chars = content.toCharArray();