[java-atk-wrapper] Table: use AccessibleExtendedTable's getAccessibleIndex when available

[Samuel Thibault <sthibaul src gnome org>]

commit ac76ccfeb0a07fbf931513c7de0bece724d8924b
Author: Samuel Thibault <samuel thibault ens-lyon org>
Date:   Sun Jul 28 13:12:27 2019 +0200

    Table: use AccessibleExtendedTable's getAccessibleIndex when available

 wrapper/org/GNOME/Accessibility/AtkTable.java | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/wrapper/org/GNOME/Accessibility/AtkTable.java b/wrapper/org/GNOME/Accessibility/AtkTable.java
index 92d1777..58ff9ae 100644
--- a/wrapper/org/GNOME/Accessibility/AtkTable.java
+++ b/wrapper/org/GNOME/Accessibility/AtkTable.java
@@ -56,6 +56,8 @@ public class AtkTable {
                        return -1;
 
                return AtkUtil.invokeInSwing ( () -> {
+                       if (acc_table instanceof AccessibleExtendedTable)
+                               return ( (AccessibleExtendedTable) acc_table).getAccessibleIndex(row, column);
                        Accessible child = acc_table.getAccessibleAt(row, column);
                        if (child == null)
                                return -1;