[TYPO3-core] FYI: Fixed bug #7700: Fatal error if caching is disabled and locking enabled (follow-up on bug #7630)

[Oliver Hader]

FYI: The following changes were committed to TYPO3_4-2 (rev. 3314)

Problem:
Calling the FE with rev. 3312 and caching disabled but locking enabled 
causes a fatal error due to a call on a non-object.

Solution:
Use t3lib_div::sysLog() instead of [t3lib_lock]->sysLog() when the 
locking objects does not exist yet.

Comments:
Furthermore I set sem_release not to show up warnings. This might happen 
if the same page gets called in the same microsecond with caching 
disabled for the page.

Bugtracker reference:
http://bugs.typo3.org/view.php?id=7700

Branch: TYPO3_4-2

olly
-- 
Oliver Hader
TYPO3 Core Team
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