Update 1.4.6 sets unlimited lifetime to no cache

[pcs-matze]

Since Update 1.4.6 there is a change of caching behavior which has effects to Magento Framework.

Steps to reproduce:
Use Cm_Cache_Backend_File::save with no $specificLifetime (= false).
Zend_Cache_Backend::getLifetime (Cm_Cache_Backend_File ~197) returns null, but Update converts null to an int.
Zend_Cache_Backend_File::_expireTime returns $time() + 0, so lifetime is already expired.

In Version 1.4.5 the int Conversion is not there, so $lifetime is still null and Zend_Cache_Backend_File::_expireTime returns 9999999999 which means unlimited lifetime.

There is no update von Zend_Cache_Backend with changend functionality so default functionality with this update to 1.4.6 were changed.

[colinmollenhour]

I will revert #35

[colinmollenhour]

Thanks for the report, fixed in 1.4.7

[pcs-matze]

Hi @colinmollenhour
Thanks for fast new update, I've already checked and it works!