Make sure that sub->id is -2 and sub->sh is NULL if subtitle doesn't

exist. Probably sanest way to avoid crash in e.g. mov demuxer without
having to check both all the time.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@23786 b3059339-0415-0410-9bf9-f77b7e298cf2

command.c

@@ -1342,6 +1342,9 @@ static int mp_property_sub(m_option_t * prop, int action, void *arg,
 		else if (ass_enabled && sh->type == 'a')
 		    ass_track = sh->ass_track;
 #endif
+            } else {
+              d_sub->id = -2;
+              d_sub->sh = NULL;
 	    }
 	}
     }