[at-spi2-atk] Add missing return on error

[Emmanuele Bassi <ebassi src gnome org>]

commit 37d6e4cb96a7d8c56270c8758da49e33872f0a36
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Fri Apr 27 11:14:46 2018 +0100

    Add missing return on error
    
    The leak fix in commit c45b5870 removed a return in an error path. Let's
    put it back.

 droute/droute.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/droute/droute.c b/droute/droute.c
index 838aacd..f38a5d8 100644
--- a/droute/droute.c
+++ b/droute/droute.c
@@ -330,6 +330,7 @@ impl_prop_GetSet (DBusMessage *message,
         DBusMessage *ret;
         ret = dbus_message_new_error (message, DBUS_ERROR_FAILED, error.message);
         dbus_error_free (&error);
+        return ret;
       }
 
     _DROUTE_DEBUG ("DRoute (handle prop): %s|%s on %s\n", pair.one, pair.two, pathstr);