[cairo] New per-scaled_font mutex to fix locking bugs

[Keith Packard]

On Mon, 2007-02-05 at 18:08 -0800, Bill Spitzak wrote:

> > The only thing I'm unsure of there is the NIL_INITIALIZER. This is
> > only used when initializing the mutex for a nil surface, so the value
> > won't ever be looked at, but it does need to compile at least.
> 
> I assumme your intention is to be able to type:
> 
> 	static cairo_mutex_t foo = CAIRO_MUTEX_NIL_INITIALIZER;

No, this initializer is used only for the nil scaled font object, which
has no glyphs and will never attempt to lock this mutex. So, it just
needs something that will compile, not generate correct data.

-- 
keith.packard at intel.com
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