Description of problem:

Draw files (*.sxd) apparently never get associated with a unique icon like the
Text, Spreadsheet, and Presentation files are.  When browsing with Nautilus
*.sxd files just appear as "blank sheet" icons like unknown files.  

Double-clicking on the icons still launches OpenOffice so it's a purely cosmetic
fix.  However, with the 8.x series being "the desktop release" it would be a
nice for Draw files to have unique icons like the rest of the office suite.