[at-spi2-atk] Don't parse non-existing arguments

[Benjamin Otte <otte src gnome org>]

commit 790dc102914a0e42e2d5f99450dbc6eb98bfad54
Author: Benjamin Otte <otte redhat com>
Date:   Thu Dec 18 21:45:36 2014 +0100

    Don't parse non-existing arguments
    
    The definition of the signal declares 0 arguments, so the listener can't
    assume there are any.
    
    Found by Michael Stahl via this valgrind snippet:
    
    ==4770== Conditional jump or move depends on uninitialised value(s)
    ==4770==    at 0x3104C10812: text_selection_changed_event_listener
    (event.c:1036)
    ==4770==    by 0x30EF42160A: signal_emit_unlocked_R (gsignal.c:3519)
    ==4770==    by 0x30EF42A180: g_signal_emit_valist (gsignal.c:3309)
    ==4770==    by 0x30EF42A8F9: g_signal_emit_by_name (gsignal.c:3405)
    ==4770==    by 0x1835EE96:
    AtkListener::notifyEvent(com::sun::star::accessibility::AccessibleEventObject
    const&) (atklistener.cxx:454)
    ==4770==    by 0x56E46BA:
    comphelper::AccessibleEventNotifier::addEvent(unsigned int,
    
    https://bugzilla.gnome.org/show_bug.cgi?id=741734

 atk-adaptor/event.c |    9 +--------
 1 files changed, 1 insertions(+), 8 deletions(-)
---
diff --git a/atk-adaptor/event.c b/atk-adaptor/event.c
index dbfa9dc..d1652da 100644
--- a/atk-adaptor/event.c
+++ b/atk-adaptor/event.c
@@ -1025,7 +1025,6 @@ text_selection_changed_event_listener (GSignalInvocationHint * signal_hint,
   AtkObject *accessible;
   GSignalQuery signal_query;
   const gchar *name, *minor;
-  gint detail1 = 0, detail2 = 0;
 
   g_signal_query (signal_hint->signal_id, &signal_query);
   name = signal_query.signal_name;
@@ -1033,13 +1032,7 @@ text_selection_changed_event_listener (GSignalInvocationHint * signal_hint,
   accessible = ATK_OBJECT (g_value_get_object (&param_values[0]));
   minor = g_quark_to_string (signal_hint->detail);
 
-  if (G_VALUE_TYPE (&param_values[1]) == G_TYPE_INT)
-    detail1 = g_value_get_int (&param_values[1]);
-
-  if (G_VALUE_TYPE (&param_values[2]) == G_TYPE_INT)
-    detail2 = g_value_get_int (&param_values[2]);
-
-  emit_event (accessible, ITF_EVENT_OBJECT, name, minor, detail1, detail2,
+  emit_event (accessible, ITF_EVENT_OBJECT, name, minor, 0, 0,
               DBUS_TYPE_STRING_AS_STRING, "", append_basic);
   return TRUE;
 }