* @seeorg.eclipse.ui.ISelectionListener#selectionChanged(org.eclipse.ui.
* IWorkbenchPart, org.eclipse.jface.viewers.ISelection)
*/
public void update(IPHPDebugTarget target) {
if (swtBrowser != null && !swtBrowser.isDisposed()) {
IPHPDebugTarget oldTarget = fTarget;
int oldcount = fUpdateCount;
fTarget = target;
DebugOutput debugOutput = null;
if (fTarget != null) {