[at-spi2-core] Fix atspi_table_cell_get_(row|column)_headers

[Mike Gorse <mgorse src gnome org>]

commit 519f6850fe931a088544489c42ec5246fe7b327a
Author: Mike Gorse <mgorse alum wpi edu>
Date:   Wed Feb 27 09:14:41 2019 -0600

    Fix atspi_table_cell_get_(row|column)_headers
    
    The sanity check was looking for the wrong signature, causing the functions
    to fail.

 atspi/atspi-table-cell.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/atspi/atspi-table-cell.c b/atspi/atspi-table-cell.c
index 1df1fa9..13203bf 100644
--- a/atspi/atspi-table-cell.c
+++ b/atspi/atspi-table-cell.c
@@ -34,7 +34,7 @@ get_object_array_and_unref (DBusMessage *reply)
   if (!reply)
     return NULL;
 
-  if (strcmp (dbus_message_get_signature (reply), "(so)") != 0)
+  if (strcmp (dbus_message_get_signature (reply), "a(so)") != 0)
   {
     dbus_message_unref (reply);
     return NULL;