get_first_and_last_page (export, &first_page, &last_page);
- export->fc.format = g_ascii_strcasecmp (file_format, "pdf") == 0 ?
+ export->fc.format = file_format && g_ascii_strcasecmp (file_format, "pdf") == 0 ?
EV_FILE_FORMAT_PDF : EV_FILE_FORMAT_PS;
export->fc.filename = export->temp_file;
export->fc.first_page = MIN (first_page, last_page);