fix an issue where the types tag holds an empty string

lib/private/app/infoparser.php

@@ -76,12 +76,16 @@ class InfoParser {
 			}
 		}
 		if (array_key_exists('types', $array)) {
+			if (is_array($array['types'])) {
 				foreach ($array['types'] as $type => $v) {
 					unset($array['types'][$type]);
 					if (is_string($type)) {
 						$array['types'][] = $type;
 					}
 				}
+			} else {
+				$array['types'] = array();
+			}
 		}
 
 		return $array;