luameta.c: Fix a message

vlclua.c:  get rid of an empty module and fix descriptions

modules/misc/lua/luameta.c

@@ -180,7 +180,7 @@ static int fetch_art( vlc_object_t *p_this, const char * psz_filename,
         }
         else
         {
-            msg_Err( p_this, "Lua playlist script %s: "
+            msg_Err( p_this, "Lua art fetcher script %s: "
                  "didn't return a string", psz_filename );
         }
     }

modules/misc/lua/vlclua.c

@@ -43,21 +43,20 @@
  *****************************************************************************/
 
 vlc_module_begin();
-    add_shortcut( "lua" );
-    add_submodule();
     add_shortcut( "luameta" );
     set_shortname( N_( "Lua Meta" ) );
-        set_description( _("Fetch Artwork using lua scripts") );
+    set_description( _("Fetch metadata using lua scripts") );
     set_capability( "meta fetcher", 10 );
     set_callbacks( E_(FindMeta), NULL );
     add_submodule();
+        set_shortname( N_( "Lua Art" ) );
+        set_description( _("Fetch artwork using lua scripts") );
         set_capability( "art finder", 10 );
         set_callbacks( E_(FindArt), NULL );
     add_submodule();
         add_shortcut( "luaplaylist" );
         set_category( CAT_INPUT );
         set_subcategory( SUBCAT_INPUT_DEMUX );
-
         set_shortname( _("Lua Playlist") );
         set_description( _("Lua Playlist Parser Interface") );
         set_capability( "demux2", 9 );