dvb: don't preparse

Author: tguillem

modules/access/dvb/access.c

@@ -127,6 +127,9 @@ static int Open( vlc_object_t *p_this )
     access_t     *p_access = (access_t*)p_this;
     access_sys_t *p_sys;
 
+    if( p_access->b_preparsing )
+        return VLC_EGENERIC;
+
     p_access->p_sys = p_sys = calloc( 1, sizeof( access_sys_t ) );
     if( !p_sys )
         return VLC_ENOMEM;