Decreased priority of raw mpeg video demuxer.

It has a too permissive detection code to have a high priority.

modules/demux/mpeg/mpgv.c

@@ -44,7 +44,7 @@ vlc_module_begin ()
     set_category( CAT_INPUT )
     set_subcategory( SUBCAT_INPUT_DEMUX )
     set_description( N_("MPEG-I/II video demuxer" ) )
-    set_capability( "demux", 100 )
+    set_capability( "demux", 5 )
     set_callbacks( Open, Close )
     add_shortcut( "mpgv" )
 vlc_module_end ()