Bug 239523 [TabbedProperties] Three JavaDoc warnings
I noticed there are three JavaDoc warnings in the org.eclipse.ui.views.properties.tabbed, there should be zero warnings and errors.
bundles/org.eclipse.ui.views.properties.tabbed/src/org/eclipse/ui/internal/views/properties/tabbed/view/TabbedPropertyList.java
*/
	protected void computeTabsThatFitInComposite() {
		tabsThatFitInComposite = Math
			.round((getSize().y - 22) / getTabHeight());
		if (tabsThatFitInComposite <= 0) {
			tabsThatFitInComposite = 1;
		}
	}
	/**
	 * Returns the element with the given index from this list viewer. Returns
	 * <code>null</code> if the index is out of range.
	 * 
	 * @param index
	 *            the zero-based index
	 * @return the element at the given index, or <code>null</code> if the
	 *         index is out of range
	 */
	public Object getElementAt(int index) {
		if (index >= 0 && index < elements.length) {
			return elements[index];
		}
		return null;
	}
	/**
	 * Returns the zero-relative index of the item which is currently selected
	 * in the receiver, or -1 if no item is selected.
	 * 
	 * @return the index of the selected item
	 */
	public int getSelectionIndex() {