[TYPO3-core] RFC: Fix JS errors with dividers2tabs and rtehtmlarea

[Andreas Otto]

This is an SVN patch request.

Type: Bugfix

Bugtracker references:
http://bugs.typo3.org/view.php?id=6340

Branches:
TYPO3_4-1 & Trunk

Problem:
Due to changes to rtehtmlarea from July this year the rte will not load and
cause JS errors.

When does this happen:
You will need an extension with more than 1 richtext field which displays
the fields of its records in tabs in the BE.
Edit the file ext_tables.php of this extension and change set dividers2tabs
to false.
The extension rtehtmlarea will now throw a JS error because the extension
relies on identifiers in the generated HTML code which will only be set if
dividers2tabs is set to true.

Solution:
Change the part in class.t3lib_tceforms.php which is causing the trouble
because of a missing check of the right conditions. 



Cheers,
Andreas
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