tdf#90077 fix freeze when enabling media toolbar in Impress

Change-Id: I402bd7319d31859510a06644eb7dc786d56b312e
Reviewed-on: https://gerrit.libreoffice.org/16213Reviewed-by: Noel Grandin <noelgrandin@gmail.com>
Tested-by: Noel Grandin <noelgrandin@gmail.com>

avmedia/source/framework/mediacontrol.cxx

@@ -605,7 +605,6 @@ IMPL_LINK( MediaControl, implZoomSelectHdl, ListBox*, p )
 IMPL_LINK_NOARG_TYPED(MediaControl, implTimeoutHdl, Idle *, void)
 {
     update();
-    maIdle.Start();
 }
 
 }