using Destroy, as otherwise the remnants get into the way for some other tests

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74194 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

tests/controls/frametest.cpp

@@ -56,7 +56,7 @@ void FrameTestCase::setUp()
 
 void FrameTestCase::tearDown()
 {
-    wxDELETE(m_frame);
+    m_frame->Destroy();
 }
 
 void FrameTestCase::Iconize()