[autotests] Verify in XWaylandInputTest that cursor is not on new mapped window

Test fails on build.kde.org. This just adds an additional condition to
verify that the setup is correct.

autotests/integration/xwayland_input_test.cpp

@@ -181,6 +181,7 @@ void XWaylandInputTest::testPointerEnterLeave()
     QVERIFY(client->surface());
 
     // move pointer into the window, should trigger an enter
+    QVERIFY(!client->geometry().contains(Cursor::pos()));
     Cursor::setPos(client->geometry().center());
     QVERIFY(enteredSpy.wait());