Fix some compiler warnings

Change-Id: I9128afcf56bd47cb6627012bb6b0d13395b432ac
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/libs/qmljs/qmljscheck.cpp

@@ -810,6 +810,8 @@ bool Check::visit(UiObjectInitializer *)
 
 void Check::endVisit(UiObjectInitializer *uiObjectInitializer)
 {
+    Q_UNUSED(uiObjectInitializer)
+
     m_propertyStack.pop();
 
     const QString type = m_typeStack.pop();