[Dextrose] [PATCH][sugar] check for empty cursor_theme

[Bernie Innocenti]

On Mon, 2011-03-14 at 13:20 -0300, Martin Abente wrote: 
> In dextrose2 caacupe tests we noticed that many laptops
> had the standard x cursor instead of the sugar one.
> 
> Accessibility options include other gconf values at
> the "/desktop/sugar/peripherals/mouse" path, and 
> since the sugar script did not check for full path
> content or existence, this script failed to set the 
> mouse cursor. under these corner cases.
> 
> Version 2: Add bernie's optimization

Acked-by: Bernie Innocenti <bernie at codewiz.org>

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