[epiphany] snapshot-service: Clarify error message

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 9af9fb9a6afdbb1fc4d15f0704604d7fdd98d002
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Fri Apr 29 09:38:30 2016 -0500

    snapshot-service: Clarify error message
    
    The snapshot service has two caches.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=765863

 lib/ephy-snapshot-service.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/lib/ephy-snapshot-service.c b/lib/ephy-snapshot-service.c
index fd551b4..bc4f308 100644
--- a/lib/ephy-snapshot-service.c
+++ b/lib/ephy-snapshot-service.c
@@ -486,7 +486,7 @@ get_snapshot_for_url_thread (GTask                   *task,
     g_task_return_new_error (task,
                              EPHY_SNAPSHOT_SERVICE_ERROR,
                              EPHY_SNAPSHOT_SERVICE_ERROR_NOT_FOUND,
-                             "Snapshot for url \"%s\" not found in cache", data->url);
+                             "Snapshot for url \"%s\" not found in disk cache", data->url);
     return;
   }
 
@@ -825,7 +825,7 @@ get_snapshot_path_for_url_thread (GTask                   *task,
     g_task_return_new_error (task,
                              EPHY_SNAPSHOT_SERVICE_ERROR,
                              EPHY_SNAPSHOT_SERVICE_ERROR_NOT_FOUND,
-                             "Snapshot for url \"%s\" not found in cache", data->url);
+                             "Snapshot for url \"%s\" not found in disk cache", data->url);
     return;
   }