player: don't print "Playing:" message if there's only 1 file

This is just redundant and slightly annoying, at least for normal
command line usage. If there are multiple entries, still print it
(because you want to know where you are). Also still print it if the
player was redirected (because you want to know where you got redirected
to).

player/loadfile.c

@@ -1396,7 +1396,10 @@ static void play_current_file(struct MPContext *mpctx)
 
     handle_force_window(mpctx, false);
 
-    MP_INFO(mpctx, "Playing: %s\n", mpctx->filename);
+    if (mpctx->playlist->first != mpctx->playing ||
+        mpctx->playlist->last != mpctx->playing ||
+        mpctx->playing->num_redirects)
+        MP_INFO(mpctx, "Playing: %s\n", mpctx->filename);
 
     assert(mpctx->demuxer == NULL);