Change subject only if message has a subject and no body. JM-1144

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/trunk@9289 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/openfire/muc/spi/LocalMUCUser.java

@@ -235,8 +235,9 @@ public class LocalMUCUser implements MUCUser {
                 }
                 else {
                     try {
-                        if (packet.getSubject() != null && packet.getSubject().trim().length() > 0
-                                && Message.Type.groupchat == packet.getType()) {
+                        if (packet.getSubject() != null && packet.getSubject().trim().length() > 0 &&
+                                Message.Type.groupchat == packet.getType() &&
+                                (packet.getBody() == null || packet.getBody().trim().isEmpty())) {
                             // An occupant is trying to change the room's subject
                             role.getChatRoom().changeSubject(packet, role);