[at-spi2-core/gnome-3-2] Warn if a device listener returns a non-bool, rather than crash

[Mike Gorse <mgorse src gnome org>]

commit a60785a4f65390863d0a1a0e149e05ca9cdad2e4
Author: Mike Gorse <mgorse linux-l2tz site>
Date:   Sun Jan 22 05:21:00 2012 -0600

    Warn if a device listener returns a non-bool, rather than crash

 atspi/atspi-device-listener.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/atspi/atspi-device-listener.c b/atspi/atspi-device-listener.c
index 1e68eb1..58a6d6a 100644
--- a/atspi/atspi-device-listener.c
+++ b/atspi/atspi-device-listener.c
@@ -389,6 +389,11 @@ _atspi_dbus_handle_DeviceEvent (DBusConnection *bus, DBusMessage *message, void
   if (klass->device_event)
   {
     retval = (*klass->device_event) (listener, &event);
+    if (retval != 0 && retval != 1)
+    {
+      g_warning ("at-spi: device event handler returned %d; should be 0 or 1", retval);
+      retval = 0;
+    }
   }
 done:
   reply = dbus_message_new_method_return (message);