[TYPO3-core] RFC #15799: Bug: Unitialized variables in t3lib

[Oliver Klee]

This is an SVN patch request.

Type: Bugfix

Bugtracker references:
http://bugs.typo3.org/view.php?id=15799

Branches:
trunk, TYPO3_4-3, TYPO3_4-3

Problem:

There are some uninitialized variables in some t3lib classes.


Solution:

- variable doesn't exist at all -> replace with sane default value
- wrong variable -> replace with correct variable
- typo -> fix


Notes:

In addition, I've removed some commented-out code and dropped one
useless self-assignment.

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