[TYPO3-core] RFC: #11716: Install Tool always sets TYPO3_CONF_VARS[FE][disableNoCacheParameter] upon save

[Michael Stucki]

This is a SVN patch request.

Type: Bugfix

Branches: TYPO3_4-2 / Trunk

Bugtracker reference:
http://bugs.typo3.org/view.php?id=11716

Problem:
When saving the "All configuration" page in the Install Tool, TYPO3
always sets the value for TYPO3_CONF_VARS[FE][disableNoCacheParameter]
to '0', even if it was not changed at all.

Solution:
The reason for this is a type mismatch. Therefore, just fallback to
"false" if the submitted value was "0". This means: The value is no
different, to not save any changes.

- michael
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