blackbox crashes desktop icon managers

[wandrien]

blackbox crashes a desktop icon manager on start up or when switching blackbox styles from the menu.

Tested applications:

• pcmanfm --desktop : crash
• stuurman-desktop : crash
• caja --force-desktop : crash
• xfdesktop : crash
• rox -S : seems to work

pcmanfm and stuurman-desktop emit the message:

Fatal IO error 11 (Resource temporarily unavailable) on X server :0.0.

caja prints the following:

(caja:183925): Gdk-WARNING **: 15:30:58.837: The program 'caja' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadDrawable (invalid Pixmap or Window parameter)'.
  (Details: serial 19573 error_code 9 request_code 62 (core protocol) minor_code 0)
  (Note to programmers: normally, X errors are reported asynchronously;
   that is, you will receive the error a while after causing it.
   To debug your program, run it with the GDK_SYNCHRONIZE environment
   variable to change this behavior. You can then get a meaningful
   backtrace from your debugger if you break on the gdk_x_error() function.)

xfdesktop exits without any messages.

[bbidulock]

I think that you need to configure BB to not manage the background of the root window to use a desktop manager. The default is for BB to manage the root background.