[BUGFIX] Suggest wizard results in fatal error

Path in class.t3lib_tceforms_suggest.php had Forms instead of
Form in the path

Change-Id: Id26a6da0ae94945753edc77391368223fece6ecd
Fixes: #40222
Related: #40095
Releases: 6.0
Reviewed-on: http://review.typo3.org/14104
Reviewed-by: Jigal van Hemert
Tested-by: Jigal van Hemert

t3lib/tceforms/class.t3lib_tceforms_suggest.php

@@ -4,5 +4,5 @@
  * and will be removed by 7.0. The class was renamed and is now located at:
  * typo3/sysext/backend/Classes/Forms/Element/SuggestElement.php
  */
-require_once \TYPO3\CMS\Core\Extension\ExtensionManager::extPath('backend') . 'Classes/Forms/Element/SuggestElement.php';
+require_once \TYPO3\CMS\Core\Extension\ExtensionManager::extPath('backend') . 'Classes/Form/Element/SuggestElement.php';
 ?>
\ No newline at end of file