input/meta.c: Don't re-run the art finder if the art was previously set in...

input/meta.c: Don't re-run the art finder if the art was previously set in input_ArtFind. (Should fix youtube.lua arturl).

src/input/meta.c

@@ -165,13 +165,21 @@ int input_ArtFind( playlist_t *p_playlist, input_item_t *p_item )
     input_FindArtInCache( p_playlist, p_item );
 
     char *psz_arturl = input_item_GetArtURL( p_item );
-    if( psz_arturl && !strncmp( psz_arturl, "file://", strlen( "file://" ) ) )
+    if( psz_arturl )
+    {
+        /* We already have an URL */
+        if( !strncmp( psz_arturl, "file://", strlen( "file://" ) ) )
         {
             free( psz_arturl );
             return 0; /* Art is in cache, no need to go further */
         }
+
         free( psz_arturl );
         
+        /* Art need to be put in cache */
+        return 1;
+    }
+
     PL_LOCK;
     p_playlist->p_private = p_item;
     psz_album = input_item_GetAlbum( p_item );