[TYPO3-core] RFC: Bugfix #9659: TCEmain wrongly tests required input-type fields

[Francois Suter]

This is an SVN patch request.

Type: Bugfix

Bugtracker references:
http://bugs.typo3.org/view.php?id=9659

Branches:
TYPO3_4-1, TYPO3_4-2 and trunk

Problem:
When an input-type field is marked as "required" in the TCA, TCEmain 
tests it simply with

if (!$value)

This is insufficient, since in the case of an "int" field, for example, 
0 is a perfectly valid value, but it will fail the "required" test.


Solution:
Introduce a finer testing:

if (!isset($value) || $value === '')

Cheers

-- 

Francois Suter
Cobweb Development Sarl - http://www.cobweb.ch
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