[BUGFIX] Show value '0' in cells of table content element

Adjust the check of the value to make it also possible
to show the valid cell value '0' of content element table.

Resolves: #83816
Releases: master, 9.5
Change-Id: Ie2f8d30b02deda5be88824cef334bf672d5cb35e
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63684


Reviewed-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Stefan Froemken <froemken@gmail.com>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Stefan Froemken <froemken@gmail.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>

typo3/sysext/fluid_styled_content/Resources/Private/Partials/Table/Columns.html

@@ -43,9 +43,9 @@
     </f:else>
 </f:if>
 
-<f:if condition="{cell}">
+<f:if condition="{cell} != ''">
     <f:then>
-        <f:format.nl2br>{cell}</f:format.nl2br>
+        {cell -> f:format.nl2br()}
     </f:then>
     <f:else>
         &nbsp;