no printers shown when file exists

[Goffioul Michael]

> Hi Guys!
> 
> I tried, but didn't find a bug tracker. I don't care, since 
> it's not critical. 
> 
> If the file 
>  $HOME/.kde/share/apps/kdeprint/printerdb_cups.txt
> does exist with zero size, no printers will be shown in the 
> add printer 
> wizard. This happened to my default user, when installing 
> foomatic on my 
> debian/(sarge|sid). Removing the file resulted in the proper 
> file, 7.7 M big, 
> being properly created and my printer working fine.

Well, let's call it a feature. Printer DB is simply cached in that
file to avoid reparsing all the available printer models each time
you add a printer. However, 0-sized file is not invalid, it means
no driver has been found on the system. Note that this file should
*never* be part of any package, as it is auto-generated. The problem
is that the user got that 0-sized file, but I don't know why.

I should probably add a "Rebuild database" button somewhere.

Michael.