Bug 298900 Renderer cannot handle an MMenuItem with a null label
java.lang.IllegalArgumentException: Argument cannot be null at org.eclipse.swt.SWT.error(SWT.java:4049) at org.eclipse.swt.SWT.error(SWT.java:3983) at org.eclipse.swt.SWT.error(SWT.java:3954) at org.eclipse.swt.widgets.Widget.error(Widget.java:467) at org.eclipse.swt.widgets.MenuItem.setText(MenuItem.java:1023) at org.eclipse.e4.workbench.ui.renderers.swt.MenuItemRenderer.setItemText(MenuItemRenderer.java:132) at org.eclipse.e4.workbench.ui.renderers.swt.MenuItemRenderer.createWidget(MenuItemRenderer.java:108) at org.eclipse.e4.ui.workbench.swt.internal.PartRenderingEngine.createWidget(PartRenderingEngine.java:406) at org.eclipse.e4.ui.workbench.swt.internal.PartRenderingEngine.createGui(PartRenderingEngine.java:272) at org.eclipse.e4.ui.workbench.swt.internal.PartRenderingEngine.createGui(PartRenderingEngine.java:349) at org.eclipse.e4.workbench.ui.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:54) at org.eclipse.e4.ui.workbench.swt.internal.PartRenderingEngine.createGui(PartRenderingEngine.java:300) at org.eclipse.e4.workbench.ui.renderers.swt.WBWRenderer.processContents(WBWRenderer.java:375) at org.eclipse.e4.ui.workbench.swt.internal.PartRenderingEngine.createGui(PartRenderingEngine.java:300) at org.eclipse.e4.ui.workbench.swt.internal.PartRenderingEngine.createGui(PartRenderingEngine.java:349)
bundles/org.eclipse.e4.ui.workbench.renderers.swt/src/org/eclipse/e4/workbench/ui/renderers/swt/MenuItemRenderer.java
* @see
	 * org.eclipse.e4.workbench.ui.renderers.swt.SWTPartRenderer#hookControllerLogic
	 * (org.eclipse.e4.ui.model.application.MUIElement)
	 */
	@Override
	public void hookControllerLogic(MUIElement me) {
		if (me instanceof MContribution
				&& ((MContribution) me).getURI() != null) {
			final MContribution contrib = (MContribution) me;
			final IEclipseContext lclContext = getContext(me);
			MenuItem mi = (MenuItem) me.getWidget();
			mi.addSelectionListener(new SelectionListener() {
				public void widgetSelected(SelectionEvent e) {
					if (contrib.getObject() == null) {
						IContributionFactory cf = (IContributionFactory) lclContext
								.get(IContributionFactory.class.getName());
						contrib.setObject(cf.create(contrib.getURI(),
								lclContext));
					}
					try {
						ContextInjectionFactory.invoke(contrib.getObject(),
								"execute", lclContext); 
					} catch (InvocationTargetException e1) {
						if (logger != null)
							logger.error(e1);
					} catch (CoreException e1) {
						if (logger != null)
							logger.error(e1);
					}
				}