[BUGFIX] Fix PHP Warning on executing Database Analyzer without changes

When running the Database Analyzers "Execute" without checking at least
one checkbox you get a PHP Warning "array_merge(): Argument #2 is not
an array" because instead of returning an array with a message only the
message string was returned.

Fix this by returning the correct variable, which is of type array.

Resolves: #59504
Releases: 6.2
Change-Id: Ifd73d617a4a97f07151fe0e6c6971bcd79c9709c
Reviewed-on: https://review.typo3.org/30670
Reviewed-by: Markus Klein
Tested-by: Markus Klein

typo3/sysext/install/Classes/Controller/Action/Tool/ImportantActions.php

@@ -264,13 +264,13 @@ class ImportantActions extends Action\AbstractAction {
 	protected function databaseAnalyzerExecute() {
 		$messages = array();
 
-		// Early return in case no updade was selected
+		// Early return in case no update was selected
 		if (empty($this->postValues['values'])) {
 			/** @var $message \TYPO3\CMS\Install\Status\StatusInterface */
 			$message = $this->objectManager->get('TYPO3\\CMS\\Install\\Status\\WarningStatus');
 			$message->setTitle('No database changes selected');
 			$messages[] = $message;
-			return $message;
+			return $messages;
 		}
 
 		/** @var \TYPO3\CMS\Install\Service\SqlSchemaMigrationService $schemaMigrationService */