Help: Add missing braces

Change-Id: Ic7f8a0bafaa29282fdaff78d3d136be1bc966995
Reviewed-by: Karsten Heimrich <karsten.heimrich@digia.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/shared/help/bookmarkmanager.cpp

@@ -781,8 +781,9 @@ void BookmarkManager::setupBookmarkModels()
                 }
             }
             parents.last()->appendRow(item);
-            if (type == QLatin1String("Folder"))
+            if (type == QLatin1String("Folder")) {
                 parents << item; lastDepths << depth;
+            }
         }
 
         if (type != QLatin1String("Folder")) {