Bug 184602 [Progress] "Widget is disposed" when setting builders twice during build
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/ProgressMonitorDialog.java
* (non-Javadoc)
		 * 
		 * @see org.eclipse.core.runtime.IProgressMonitorWithBlocking#setBlocked(org.eclipse.core.runtime.IStatus)
		 */
		public void setBlocked(IStatus reason) {
			locked = true;
			updateForSetBlocked(reason);
		}
	}
	/**
	 * Clear blocked state from the receiver.
	 */
	protected void updateForClearBlocked() {
		setMessage(task, true);
		imageLabel.setImage(getImage());
	}
	/**
	 * Set blocked state from the receiver.
	 * 
	 * @param reason
	 *            IStatus that gives the details
	 */
	protected void updateForSetBlocked(IStatus reason) {
		setMessage(reason.getMessage(), true);
		imageLabel.setImage(getImage());
	}
	/**
	 * Creates a progress monitor dialog under the given shell. The dialog has a
	 * standard title and no image. <code>open</code> is non-blocking.
	 *