Description:
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When getting a value from cache, the optional parameter $success is not being set and it stays null, for both successful and unsuccessful operations.

Test script:
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<?php

$setResult = wincache_ucache_set('foo', 'bar');
$successfulGetResult = wincache_ucache_get('foo', $successShouldBeTrue);
$unsuccessfulGetResult = wincache_ucache_get('foz', $successShouldBeFalse);

echo '$setResult = ' . var_export($setResult, true) . PHP_EOL;
echo '$successfulGetResult = ' . var_export($successfulGetResult, true) . PHP_EOL;
echo '$successShouldBeTrue = ' . var_export($successShouldBeTrue, true) . PHP_EOL;
echo '$unsuccessfulGetResult = ' . var_export($unsuccessfulGetResult, true) . PHP_EOL;
echo '$successShouldBeFalse = ' . var_export($successShouldBeFalse, true) . PHP_EOL;


Expected result:
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$setResult = true
$successfulGetResult = 'bar'
$successShouldBeTrue = true
$unsuccessfulGetResult = false
$successShouldBeFalse = false

Actual result:
--------------
$setResult = true
$successfulGetResult = 'bar'
$successShouldBeTrue = NULL
$unsuccessfulGetResult = false
$successShouldBeFalse = NULL