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observer: Silence gcc warning

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GCC complains that:

cairo-surface-observer.c:289:26: warning: ignoring return value of
'cairo_device_acquire', declared with attribute warn_unused_result
[-Wunused-result]

Explain why it's safe to ignore it in a comment.
This commit is contained in:
Andrea Canciani 2012-01-30 15:34:10 +01:00
parent f2567e95a1
commit 469994ac19
1 changed files with 5 additions and 1 deletions
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6
src/cairo-surface-observer.c
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@ -286,7 +286,11 @@ static void
_cairo_device_observer_lock (void *_device)
{
cairo_device_observer_t *device = (cairo_device_observer_t *) _device;
cairo_device_acquire (device->target);
cairo_status_t ignored;
/* cairo_device_acquire() can fail for nil and finished
* devices. We don't care about observing them. */
ignored = cairo_device_acquire (device->target);
}
static void