Dereference so we can be sure the type is not forward declared.

Change-Id: I4d67a08dc645649e767153f3aa0dc57b15d50a84
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>

tests/auto/cmake/test_private_includes/main.cpp

@@ -47,6 +47,8 @@ int main(int argc, char **argv)
 {
     QGuiApplication app(argc, argv);
 
-    QPlatformScreen *handle = app.screens().first()->handle();
+    QPlatformScreen *screenHandle = app.screens().first()->handle();
+    screenHandle->geometry();
+
     return 0;
 }