Fix “Languages are not set” column information

Information “Languages are not set” appears in column admin column in my custom_posts although the post is translated.

This is because my custom post does not have post_content field which is expected from the function: qtranxf_languageColumn, but it has a post title which can be checked also.

So I propose to change the fourth line of the function to something like:
$available_languages = qtranxf_getAvailableLanguages($post->post_content?$post->post_content:$post->post_title);