Update smack-debug/src/main/java/org/jivesoftware/smackx/debugger/EnhancedDebugger.java

Co-authored-by: Florian Schmaus <flo@geekplace.eu>

Author: stokito

smack-debug/src/main/java/org/jivesoftware/smackx/debugger/EnhancedDebugger.java

@@ -764,6 +764,7 @@ private void addReadPacketToTable(final SimpleDateFormat dateFormatter, final To
             @Override
             public void run() {
                 // Ensure the table is not null before attempting to access it
+                var messageTable = messageTable;
                 if (messagesTable == null) {
                     return;
                 }