minor: getting rid of warning

SVN: 23019

openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/ui/widget/LabeledItem.java

@@ -71,7 +71,8 @@ public class LabeledItem<T>
             return false;
         if (getClass() != obj.getClass())
             return false;
-        LabeledItem other = (LabeledItem) obj;
+        @SuppressWarnings("unchecked")
+        LabeledItem<T> other = (LabeledItem<T>) obj;
         if (item == null)
         {
             if (other.item != null)