Fixed string typo

portfolio/boxnet/lang/en/portfolio_boxnet.php

@@ -26,7 +26,7 @@
 $string['apikey'] = 'API key';
 $string['err_noapikey'] = 'No API Key';
 $string['err_noapikey_help'] = 'There is no API Key configured for this plugin.  You can get one of these from http://enabled.box.net';
-$string['existingfolder'] = 'Exiting folder to put file(s) into';
+$string['existingfolder'] = 'Existing folder to put file(s) into';
 $string['folderclash'] = 'The folder you asked to create already exists!';
 $string['foldercreatefailed'] = 'Failed to create your target folder on box.net';
 $string['folderlistfailed'] = 'Failed to retrieve a folder listing from box.net';