[folks] Exit EDS test early in case multiple signal emissions are in-flight.

[Travis Reitter <treitter src gnome org>]

commit 5b0711a6f6b3a4c3ba003dddc0c6a2a27542ad98
Author: Travis Reitter <travis reitter collabora co uk>
Date:   Thu Sep 22 10:30:15 2011 -0700

    Exit EDS test early in case multiple signal emissions are in-flight.
    
    This fixes a race between the mainloop being nullified and a dependent
    signal handler calling quit() again (no idea how the signals were
    getting issued and handled after the initial quit() though).

 tests/eds/link-personas-diff-stores.vala |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/tests/eds/link-personas-diff-stores.vala b/tests/eds/link-personas-diff-stores.vala
index d319f3a..e20036a 100644
--- a/tests/eds/link-personas-diff-stores.vala
+++ b/tests/eds/link-personas-diff-stores.vala
@@ -209,6 +209,10 @@ public class LinkPersonasDiffStoresTests : Folks.TestCase
    */
   private async void _check_personas (Individual i)
     {
+      /* Exit early if this is a lingering callback */
+      if (this._linked_individual_found == true)
+        return;
+
       Persona first_persona = null;
       foreach (var p in i.personas)
         {