Fix OPENDJ-525: Remove compiler warnings when building using JDK7

Matthew Swift

19.26.2012 108e2020c1d149962dfc43dcbc6bc24a05a8e5f7

 opends/src/build-tools/org/opends/build/tools/GenerateMessageFile.java

@@ -23,7 +23,7 @@
 *
 *
 *      Copyright 2008-2010 Sun Microsystems, Inc.
 *      Portions Copyright 2011 ForgeRock AS
 *      Portions Copyright 2011-2012 ForgeRock AS
 */
package org.opends.build.tools;

@@ -700,7 +700,7 @@
                              KEY_FORM_MSG);
            }

            if (c == null) {
            if (s == null) {
              throw new BuildException(
                      "No severity could be assigned to message " +
                              key + ".  The severity " +