[epiphany] uri-tester: Fix misuse of GCancellable

[Michael Catanzaro <mcatanzaro src gnome org>]

commit aa9e90aeff7ea49b6783871fdce050ec0e6308fe
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Tue Nov 1 18:56:38 2016 -0500

    uri-tester: Fix misuse of GCancellable

 embed/ephy-uri-tester.c |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)
---
diff --git a/embed/ephy-uri-tester.c b/embed/ephy-uri-tester.c
index c645bfe..37604ff 100644
--- a/embed/ephy-uri-tester.c
+++ b/embed/ephy-uri-tester.c
@@ -1043,6 +1043,8 @@ https_everywhere_context_init_cb (HTTPSEverywhereContext *context,
   g_list_free_full (tester->deferred_requests, (GDestroyNotify)deferred_request_free);
 
   ephy_uri_tester_update_https_everywhere_rulesets (tester);
+
+  g_object_unref (tester);
 }
 
 static void
@@ -1111,7 +1113,7 @@ ephy_uri_tester_constructed (GObject *object)
   https_everywhere_context_init (tester->https_everywhere_context,
                                  tester->cancellable,
                                  (GAsyncReadyCallback)https_everywhere_context_init_cb,
-                                 tester);
+                                 g_object_ref (tester));
 
   ephy_uri_tester_load_filters (tester);
   ephy_uri_tester_load_patterns (tester);
@@ -1145,7 +1147,10 @@ ephy_uri_tester_dispose (GObject *object)
 
   LOG ("EphyUriTester disposing %p", object);
 
-  g_clear_object (&tester->cancellable);
+  if (tester->cancellable) {
+    g_cancellable_cancel (tester->cancellable);
+    g_clear_object (&tester->cancellable);
+  }
 
   G_OBJECT_CLASS (ephy_uri_tester_parent_class)->dispose (object);
 }