[dev] [patch] tree graphics fix

[Chuck Hagenbuch]

Quoting ViliusŠumskas <vilius at lnk.lt>:

> ghm. Very strange, before this fix I've got no slashes at all:
>
> https://mail.lnk.lt/horde/graphics/treefolder.gif
> https://mail.lnk.lt/horde/graphics/treefolderopen.gif
> ....
>
> and so on in DataTree Browser page.

Look at what I just committed to html.php.

-chuck

--
"But she goes not abroad in search of monsters to destroy." - John 
Quincy Adams