bugzid:4305 don't try to get image url if there is no image for the product
bugzid:4305 move image validation to static function
bugzid:4305 remove unused var
bugzid:4305 remove initialization of image urls to empty string
Merge pull request #16 from maxenglander/bug-4305

bugzid:4305 don't try to get image url if there is no image for the prod...