Bug 182190 [StatusHandling] [Wizards] getControl assert on wizard page has no message
M6 If you forget to set the control on your wizard page our assert gives no feedback. We need an error message.
bundles/org.eclipse.jface/src/org/eclipse/jface/wizard/WizardDialog.java
if (currentTask == null) {
					currentTask = name;
				}
            }
        };
    }
    /**
     * Creates the container that holds all pages.
     * @param parent
     * @return Composite
     */
    private Composite createPageContainer(Composite parent) {
        Composite result = new Composite(parent, SWT.NULL);
        result.setLayout(pageContainerLayout);
        return result;
    }
    /**
     * Allow the wizard's pages to pre-create their page controls.
     * This allows the wizard dialog to open to the correct size.
     */
    private void createPageControls() {
        
        
        wizard.createPageControls(pageContainer);
        
        IWizardPage[] pages = wizard.getPages();
        for (int i = 0; i < pages.length; i++) {
            IWizardPage page = pages[i];
            if (page.getControl() != null) {