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xlib/shm: Only destroy an existing damage

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_cairo_damage_destroy() does not like to be passed a NULL.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2013-01-08 16:38:11 +00:00
parent 2ed484817e
commit e4acba6d1d
1 changed files with 4 additions and 2 deletions
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6
src/cairo-xlib-surface-shm.c
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@ -710,8 +710,10 @@ _cairo_xlib_shm_surface_finish (void *abstract_surface)
cairo_xlib_display_t *display;
cairo_status_t status;
_cairo_damage_destroy (shm->image.base.damage);
shm->image.base.damage = _cairo_damage_create_in_error (CAIRO_STATUS_SURFACE_FINISHED);
if (shm->image.base.damage) {
_cairo_damage_destroy (shm->image.base.damage);
shm->image.base.damage = _cairo_damage_create_in_error (CAIRO_STATUS_SURFACE_FINISHED);
}
status = _cairo_xlib_display_acquire (shm->image.base.device, &display);
if (unlikely (status))