M core/project_api.php

• (project_ensure_valid_upload_path): Added is_dir() check, although it used to
  fail for files without it!

M lang/strings_english.txt

• Fixed a typo

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@1900 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9