Memcache Statistics Misses and Hits issue

Problem/Motivation

Memcache Statistics page shows wrong data for Misses and Hits.

Steps to reproduce

Visit admin/reports/memcache Misses and Hits show 0 or 1

Proposed resolution

Update memcache/memcache_admin/src/Stats/MemcacheStatsObject.php
- $hits = isset($this->stats['get_hits']) ?? 0;
- $misses = isset($this->stats['get_misses']) ?? 0;

+ $hits = isset($this->stats['get_hits']) ? $this->stats['get_hits'] : 0;
+ $misses = isset($this->stats['get_misses']) ? $this->stats['get_misses'] : 0;