[evolution] EPhotoCache: Fix a runtime warning.

[Matthew Barnes <mbarnes src gnome org>]

commit 5e1934425ddedb3848a66f16100e4ee1ea12aeb1
Author: Matthew Barnes <mbarnes redhat com>
Date:   Sat Apr 20 12:30:04 2013 -0400

    EPhotoCache: Fix a runtime warning.
    
    Stop searching address books on the first error but don't indicate
    failure if we've managed to accumulate contacts prior to the error.

 e-util/e-photo-cache.c | 31 ++++++++++++++++++++++++-------
 1 file changed, 24 insertions(+), 7 deletions(-)
---
diff --git a/e-util/e-photo-cache.c b/e-util/e-photo-cache.c
index 38d86a7..74de1e9 100644
--- a/e-util/e-photo-cache.c
+++ b/e-util/e-photo-cache.c
@@ -378,6 +378,7 @@ photo_cache_find_contacts (EPhotoCache *photo_cache,
                ESource *source = E_SOURCE (link->data);
                EClient *client;
                GSList *contact_list = NULL;
+               GError *local_error = NULL;
 
                /* Skip disabled sources. */
                if (!e_source_get_enabled (source))
@@ -386,21 +387,37 @@ photo_cache_find_contacts (EPhotoCache *photo_cache,
                client = e_client_cache_get_client_sync (
                        client_cache, source,
                        E_SOURCE_EXTENSION_ADDRESS_BOOK,
-                       cancellable, error);
-
-               if (client == NULL) {
-                       success = FALSE;
+                       cancellable, &local_error);
+
+               if (local_error != NULL) {
+                       g_warn_if_fail (client == NULL);
+                       if (g_queue_is_empty (out_contacts)) {
+                               g_propagate_error (error, local_error);
+                               success = FALSE;
+                       } else {
+                               /* Clear the error if we already
+                                * have matching contacts queued. */
+                               g_clear_error (&local_error);
+                       }
                        break;
                }
 
-               success = e_book_client_get_contacts_sync (
+               e_book_client_get_contacts_sync (
                        E_BOOK_CLIENT (client), book_query_string,
-                       &contact_list, cancellable, error);
+                       &contact_list, cancellable, &local_error);
 
                g_object_unref (client);
 
-               if (!success) {
+               if (local_error != NULL) {
                        g_warn_if_fail (contact_list == NULL);
+                       if (g_queue_is_empty (out_contacts)) {
+                               g_propagate_error (error, local_error);
+                               success = FALSE;
+                       } else {
+                               /* Clear the error if we already
+                                * have matching contacts queued. */
+                               g_clear_error (&local_error);
+                       }
                        break;
                }