In HandleMessage(), don't let the 0xF0 case fallthrough. Otherwise setting...

In HandleMessage(), don't let the 0xF0 case fallthrough. Otherwise setting datalen would be pointless.
Signed-off-by: Rémi Duraffort <ivoire@videolan.org>
(cherry picked from commit 7dd7ba08)
Signed-off-by: Rémi Duraffort <ivoire@videolan.org>

modules/demux/smf.c

@@ -512,6 +512,7 @@ int HandleMessage (demux_t *p_demux, mtrk_t *tr)
                     datalen = 0;
                     break;
             }
+            break;
         case 0xC0:
         case 0xD0:
             datalen = 1;