I got an Notice while searching for content in the site.

Notice: Trying to get property of non-object in enterprise_blog_preprocess_comment() (line 53 of /home/mysite/public_html/mysite/sites/all/modules/enterprise_blog/enterprise_blog.module).

when i search for few content types in my site i am getting a notice a shown. I dont have ay idea.

Plz any ideas?
Thanks Lot.