[at-spi2-atk] Check that we have a valid path when emitting a signal

[Mike Gorse <mgorse src gnome org>]

commit 5ca9cae5d42df1109550e05e8bb06ecd8b009f70
Author: Mike Gorse <mgorse novell com>
Date:   Fri Feb 10 06:11:37 2012 -0600

    Check that we have a valid path when emitting a signal
    
    If we don't have a valid object path in emit_event (ie, if NULL is
    passed in, for some strange reason), then return rather than crashing in
    libdbus.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=669794

 atk-adaptor/event.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/atk-adaptor/event.c b/atk-adaptor/event.c
index 6cf19fa..22f817d 100644
--- a/atk-adaptor/event.c
+++ b/atk-adaptor/event.c
@@ -471,6 +471,7 @@ emit_event (AtkObject  *obj,
     return;
 
   path =  spi_register_object_to_path (spi_global_register, G_OBJECT (obj));
+  g_return_if_fail (path != NULL);
 
   /*
    * This is very annoying, but as '-' isn't a legal signal