don't delete uninitialized m_eventHandler pointer if initialization failed (patch 1819944)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@49496 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/unix/mediactrl.cpp

@@ -959,7 +959,8 @@ void wxGStreamerMediaEventHandler::OnMediaFinish(wxMediaEvent& WXUNUSED(event))
 // Sets m_playbin to NULL signifying we havn't loaded anything yet
 //-----------------------------------------------------------------------------
 wxGStreamerMediaBackend::wxGStreamerMediaBackend()
-    : m_playbin(NULL)
+    : m_playbin(NULL),
+      m_eventHandler(NULL)
 {
 }