[epiphany] snapshot-service: silent a build warning

[Claudio Saavedra <csaavedra src gnome org>]

commit 44aa1db472ed5849132e4bd6c37d760f07dc807d
Author: Claudio Saavedra <csaavedra igalia com>
Date:   Wed Dec 9 17:15:02 2015 +0100

    snapshot-service: silent a build warning

 lib/ephy-snapshot-service.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/lib/ephy-snapshot-service.c b/lib/ephy-snapshot-service.c
index 946b5b9..fc77441 100644
--- a/lib/ephy-snapshot-service.c
+++ b/lib/ephy-snapshot-service.c
@@ -566,7 +566,7 @@ ephy_snapshot_service_get_snapshot_async (EphySnapshotService *service,
                                                       (GAsyncReadyCallback)got_snapshot_for_url,
                                                       task);
   else
-    g_idle_add (ephy_snapshot_service_take_from_webview, task);
+    g_idle_add ((GSourceFunc)ephy_snapshot_service_take_from_webview, task);
 }
 
 /**