[BUGFIX] Compatibility fix for get_html_translation_table()

t3lib_cs::entities_to_utf8() triggers a PHP warning on versions
lower than 5.3.4 because too many parameters were given.
See http://php.net/manual/en/function.get-html-translation-table.php

Change-Id: Ic302f2b8c2902ec8685dfb2d974273071bbbdcb7
Fixes: #39287
Releases: 6.0, 4.7
Reviewed-on: https://review.typo3.org/17180
Reviewed-by: Michael Stucki
Tested-by: Michael Stucki