QmlJs: fix false positives for properties

Resolve references while looking up for object members.

Task-number: QTCREATORBUG-18362
Change-Id: I9d2b2457fb3488c723a41e4e8ba1fc0ea9fe800f
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/libs/qmljs/qmljscheck.cpp

@@ -1781,6 +1781,9 @@ const Value *Check::checkScopeObjectMember(const UiQualifiedId *id)
             addMessage(ErrInvalidMember, idPart->identifierToken, propertyName, objectValue->className());
             return 0;
         }
+        // resolve references
+        if (const Reference *ref = value->asReference())
+            value = _context->lookupReference(ref);
     }
 
     return value;