Only return a string for the attribute value
(an empty string if the attribute is not set).
The previous implementation was based on the incorrect
signature in the XML spec for the AT-SPI Text interface from
before the AT-SPI commit that removed the extra out params [1]:
commit 8786849ce6e9914383aa766ff9ce7e00f5b2178d
Author: Patryk Kaczmarek <patryk.k@samsung.com>
Date: Mon Sep 28 14:23:15 2015 +0200
Fixed atspi_text_ functions
* atspi_text_get_text_attribute_value
Fixed dbus signature in _atspi_dbus_call function
and add missing argument for string.
* atspi_text_get_default_attributes
Receiving return value by reference from hash table
https://bugzilla.gnome.org/show_bug.cgi?id=755731
[1] 8786849ce6
Fixes: QTBUG-105752
Pick-to: 6.4
Change-Id: I66d3c484ecc4b469684635723242c915e4365e6a
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
e6599bfa61