doc: Clarify that cairo_surface_get_device() can return NULL

This commit is contained in:
Benjamin Otte 2010-07-09 03:04:27 +02:00
parent 65d0590b04
commit 739d6e35fa

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@ -239,7 +239,8 @@ _cairo_surface_allocate_unique_id (void)
* This function returns the device for a @surface.
* See #cairo_device_t.
*
* Return value: The device for @surface.
* Return value: The device for @surface or %NULL if the surface does
* not have an associated device.
*
* Since: 1.10
**/