change expried

[Bournwog]

redis don't accept zero expired

[opengeek]

@Bournwog — thanks for your contribution. Can you provide a little more detail regarding this change?

[Bournwog]

if we set $expire = 0 in this code (infinity cache), redis throw error because "expire" is zero
$set = $this->redis->set($this->getCacheKey($key),$var,$expire);