Eliminate possible runaway loop on EDT

updateGui would sleep if tabbedPane is null, but this isn't necessary as
updateGui should be called again when the tabbedPane is initialized
anyway. Now just return if tabbedPane isn't defined yet.

Change-Id: I94d17a8b4c6e780292f6346741def28a0a5e7408

src/net/bubbaland/gui/BubbaDragDropTabFrame.java

@@ -88,7 +88,6 @@ public void addTab(String tabName) {
 			BubbaMainPanel newTab = this.tabFactory(tabName.replaceFirst(" \\([0-9]*\\)", ""));
 			this.tabbedPane.addTab(tabName, newTab);
 			this.tabbedPane.setSelectedComponent(newTab);
-			newTab.updateGui();
 		} catch (IllegalArgumentException | SecurityException exception) {
 			exception.printStackTrace();
 		}
@@ -194,13 +193,12 @@ public String getTabDescription() {
 	public void updateGui() {
 		super.updateGui();
 
-		// Propagate update to current tab
-		while (this.tabbedPane == null) {
+		if (this.tabbedPane == null) {
 			System.out.println(this.getClass().getSimpleName() + "Can't update null tabbedPane!");
-			try {
-				Thread.sleep(50);
-			} catch (final InterruptedException exception) {}
+			return;
 		}
+
+		// Propagate update to current tab
 		Component tab = this.tabbedPane.getSelectedComponent();
 		if (tab instanceof BubbaMainPanel) {
 			( (BubbaMainPanel) tab ).updateGui();