Fix bug where files in skins/ directory were listed on skins list (#7180)

CHANGELOG

@@ -12,6 +12,7 @@ CHANGELOG Roundcube Webmail
 - Fix PHP Warning: array_filter() expects parameter 1 to be array, null given in subscriptions_option plugin (#7165)
 - Fix unexpected error message when mail refresh involves folder auto-unsubscribe (#6923)
 - Fix recipient duplicates in print-view when the recipient list has been expanded (#7169)
+- Fix bug where files in skins/ directory were listed on skins list (#7180)
 
 RELEASE 1.4.2
 -------------

program/steps/settings/func.inc

@@ -1292,7 +1292,10 @@ function rcmail_get_skins()
 
     while (($file = readdir($dir)) !== false) {
         $filename = $path . '/' . $file;
-        if ($file[0] != '.' && (empty($limit) || in_array($file, $limit) && is_dir($filename) && is_readable($filename))) {
+        if ($file[0] != '.'
+            && (empty($limit) || in_array($file, $limit))
+            && is_dir($filename) && is_readable($filename)
+        ) {
             $skins[] = $file;
         }
     }