Fix warning in QVariant test.

Values from different enums were compared.

Change-Id: I2faf73976e4b24abbdc915e8445256fe7a5be5bd
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>

tests/auto/gui/kernel/qguivariant/test/tst_qguivariant.cpp

@@ -640,7 +640,7 @@ void tst_QGuiVariant::writeToReadFromOldDataStream()
         dataFileStream.setVersion(QDataStream::Qt_4_9);
         QVariant readVariant;
         dataFileStream >> readVariant;
-        QVERIFY(readVariant.type() == QMetaType::QPolygonF);
+        QVERIFY(readVariant.userType() == QMetaType::QPolygonF);
         QCOMPARE(testVariant, readVariant);
         file.close();
     }