[gnome-photos] base-item: Check for errors when running the print operation

[Debarshi Ray <debarshir src gnome org>]

commit 80e7d47d3b2f4c1af86659a3842e83b27139a098
Author: Rafael Fonseca <r4f4rfs gmail com>
Date:   Tue Mar 15 17:16:32 2016 +0100

    base-item: Check for errors when running the print operation
    
    https://bugzilla.gnome.org/show_bug.cgi?id=763500

 src/photos-base-item.c |   12 ++++++++++--
 1 files changed, 10 insertions(+), 2 deletions(-)
---
diff --git a/src/photos-base-item.c b/src/photos-base-item.c
index 00912ac..32c7bc3 100644
--- a/src/photos-base-item.c
+++ b/src/photos-base-item.c
@@ -1446,6 +1446,7 @@ static void
 photos_base_item_print_load (GObject *source_object, GAsyncResult *res, gpointer user_data)
 {
   PhotosBaseItem *self = PHOTOS_BASE_ITEM (source_object);
+  GError *error = NULL;
   GtkWindow *toplevel = GTK_WINDOW (user_data);
   GeglNode *node;
   GtkPrintOperation *print_op = NULL;
@@ -1460,9 +1461,16 @@ photos_base_item_print_load (GObject *source_object, GAsyncResult *res, gpointer
   /* It is self managing. */
   photos_print_notification_new (print_op);
 
-  print_res = gtk_print_operation_run (print_op, GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG, toplevel, NULL);
+  print_res = gtk_print_operation_run (print_op, GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG, toplevel, &error);
   if (print_res == GTK_PRINT_OPERATION_RESULT_APPLY)
-    photos_selection_controller_set_selection_mode (self->priv->sel_cntrlr, FALSE);
+    {
+      photos_selection_controller_set_selection_mode (self->priv->sel_cntrlr, FALSE);
+    }
+  else if (print_res == GTK_PRINT_OPERATION_RESULT_ERROR)
+    {
+      g_warning ("Unable to print file: %s", error->message);
+      g_error_free (error);
+    }
 
  out:
   g_clear_object (&node);