Enable play count with Remote

The purpose is to get the "Unplayed" tab for Podcasts in Remote
working, which requires that we increase the counter even when
playback is with Remote/RAOP (and not just iTunes streaming, which
was already working)

src/player.c

@@ -1148,6 +1148,8 @@ source_check(void)
     {
       i++;
 
+      db_file_inc_playcount((int)cur_playing->id);
+
       /* Stop playback if:
        * - at end of playlist (NULL)
        * - repeat OFF and at end of playlist (wraparound)