Fixup warning due to deprecated Thread.getId (in Examples only)

Author: jonahgraham

examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/SnippetExplorer.java

@@ -1042,7 +1042,7 @@ public void stopSnippets() {
 				if (!launchedSnippets.isEmpty()) {
 					System.err.println("Some Snippets are still running:");
 					for (Thread t : launchedSnippets) {
-						System.err.println("    " + t.getName() + " (ThreadId: " + t.getId() + ")");
+						System.err.println("    " + t.getName() + " (ThreadId: " + t.threadId() + ")");
 						final Display d = Display.findDisplay(t);
 						if (d != null && !d.isDisposed()) {
 							d.syncExec(d::dispose);