[gnome-online-accounts] identity: Don't leak the invocation when handling SignOut

[Debarshi Ray <debarshir src gnome org>]

commit b22321a1f7347dbedb869d5274f2ef142aed29ab
Author: Debarshi Ray <debarshir gnome org>
Date:   Thu Jan 5 11:44:24 2017 +0100

    identity: Don't leak the invocation when handling SignOut
    
    https://bugzilla.gnome.org/show_bug.cgi?id=776897

 src/goaidentity/goaidentityservice.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/goaidentity/goaidentityservice.c b/src/goaidentity/goaidentityservice.c
index 8d4bc21..0007417 100644
--- a/src/goaidentity/goaidentityservice.c
+++ b/src/goaidentity/goaidentityservice.c
@@ -420,6 +420,8 @@ on_sign_out_handled (GoaIdentityService    *self,
   else
     goa_identity_service_manager_complete_sign_out (GOA_IDENTITY_SERVICE_MANAGER (self),
                                                     invocation);
+
+  g_object_unref (invocation);
 }
 
 static void