fix populating account array with missing default values

- both $userData and $defaultUserData have numeric indices
- each element contains at least the name and other fields
- appending the missing data array is sufficient

Signed-off-by: Arthur Schiwon <blizzz@arthur-schiwon.de>

lib/private/Accounts/AccountManager.php

@@ -473,15 +473,11 @@ protected function sendEmailVerificationEmail(IUser $user, string $email): bool
 	 * Make sure that all expected data are set
 	 */
 	protected function addMissingDefaultValues(array $userData, array $defaultUserData): array {
-		foreach ($defaultUserData as $i => $value) {
-			// If property doesn't exists, initialize it
-			if (!array_key_exists($i, $userData)) {
-				$userData[$i] = [];
+		foreach ($defaultUserData as $defaultDataItem) {
+			// If property does not exist, initialize it
+			if (!array_key_exists($defaultDataItem['name'], $userData)) {
+				$userData[] = $defaultDataItem;
 			}
-
-			// Merge and extend default missing values
-			$defaultValueIndex = array_search($value['name'], array_column($defaultUserData, 'name'));
-			$userData[$i] = array_merge($defaultUserData[$defaultValueIndex], $userData[$i]);
 		}
 
 		return $userData;