Avoid unused private field errors

Change-Id: I09fd613a8e6ed8283faebeb802cc30c57ac8d37b

avmedia/source/opengl/oglmanager.cxx

@@ -20,6 +20,7 @@ namespace avmedia { namespace ogl {
 OGLManager::OGLManager( const uno::Reference< lang::XMultiServiceFactory >& rMgr )
     : m_xMgr( rMgr )
 {
+    (void) m_xMgr;
 }
 
 OGLManager::~OGLManager()

avmedia/source/opengl/oglwindow.cxx

@@ -18,6 +18,7 @@ OGLWindow::OGLWindow( OGLPlayer& rPlayer )
     : m_rPlayer( rPlayer )
     , meZoomLevel( media::ZoomLevel_ORIGINAL )
 {
+    (void) m_rPlayer;
 }
 
 OGLWindow::~OGLWindow()