do not crash when leaving an empty menu with ok & right

git-svn-id: file:///home/bas/coolstream_public_svn/THIRDPARTY/applications/neutrino-experimental@1127 e54a6e83-5905-42d5-8d5c-058d10e6a962

src/gui/widget/menue.cpp

@@ -541,7 +541,7 @@ int CMenuWidget::exec(CMenuTarget* parent, const std::string &)
 				case (CRCInput::RC_right):
 				case (CRCInput::RC_ok):
 					{
-						if(hasItem()) {
+						if(hasItem() && selected > -1) {
 							//exec this item...
 							CMenuItem* item = items[selected];
 							item->msg = msg;