Merge pull request #385 from adiaholic/bugFix

Remove unexpected `MucNotJoinedException` from `MultiUserChat.leave()`

smack-extensions/src/main/java/org/jivesoftware/smackx/muc/MultiUserChat.java

@@ -732,10 +732,6 @@ public class MultiUserChat {
         // "if  (!joined) return" because it should be always be possible to leave the room in case the instance's
         // state does not reflect the actual state.
 
-        // Reset occupant information first so that we are assume that we left the room even if sendStanza() would
-        // throw.
-        userHasLeft();
-
         final EntityFullJid myRoomJid = this.myRoomJid;
         if (myRoomJid == null) {
             throw new MucNotJoinedException(this);
@@ -757,6 +753,10 @@ public class MultiUserChat {
                                     )
                                 );
 
+        // Reset occupant information first so that we are assume that we left the room even if sendStanza() would
+        // throw.
+        userHasLeft();
+
         Presence reflectedLeavePresence = connection.createStanzaCollectorAndSend(reflectedLeavePresenceFilter, leavePresence).nextResultOrThrow();
 
         return reflectedLeavePresence;