Fixed MPD_CMD_READ_LIST_SINGLE for real this time

Author: Flo Faber

src/Socket.php

@@ -542,7 +542,7 @@ protected function parse(array $lines, int $mode = MPD_CMD_READ_NORMAL, array $l
 
         // If we only parse a list with a single possible key make sure $first_key is already set OR $first_key equals the current key.
         // If true push the value to the result array. That way we eliminate the risk of funky responses if this mode is used incorrectly.
-      }elseif($mode === MPD_CMD_READ_LIST_SINGLE){
+      }elseif($mode === MPD_CMD_READ_LIST_SINGLE && ($first_key === $k || in_array($k, $list_starts))){
         $b[] = $v;
       }