Fix wincache notice

### Issue
Notice: Undefined index: cache_entries in JROOT\libraries\joomla\cache\storage\wincache.php on line 64 Warning: Invalid argument supplied for foreach() in JROOT\libraries\joomla\cache\storage\wincache.php on line 68

### Explanation
According to the PHP Docs for wincache_ucache_info():
http://www.php.net/manual/en/function.wincache-ucache-info.php

We have no index called "cache_entries" only a "ucache_entries"

### This PR
1. change "cache_entries" to "ucache_entries"
2. fix mirror CS

### Tracker:
http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_item_id=33811&start=0