[dates] Return an error when no events were imported

[Ross Burton <rburton src gnome org>]

commit 8bb002b21bad86daedee5f322f9107b817b13ed0
Author: Long Bu <long bu intel com>
Date:   Tue Jul 14 09:02:02 2009 +0100

    Return an error when no events were imported
    
    Signed-off-by: Ross Burton <ross linux intel com>

 src/dates_callbacks.c |   18 +++++++++++++++---
 1 files changed, 15 insertions(+), 3 deletions(-)
---
diff --git a/src/dates_callbacks.c b/src/dates_callbacks.c
index 6ae462b..76e2354 100644
--- a/src/dates_callbacks.c
+++ b/src/dates_callbacks.c
@@ -1762,6 +1762,7 @@ dates_import_calendar_data_from_file (ECal *cal, gchar *filename, GError **error
   GIOChannel *channel = NULL;
   gchar *line;
   gsize length;
+  gint num_comp_imported = 0;
 
   channel = g_io_channel_new_file (filename, "r", &tmp_error);
 
@@ -1813,7 +1814,9 @@ dates_import_calendar_data_from_file (ECal *cal, gchar *filename, GError **error
             g_free (uid);
             return FALSE;
           }
-
+					
+          num_comp_imported ++;
+          
           icalcompiter_next (&iter);
           g_free (uid);
         }
@@ -1837,8 +1840,17 @@ dates_import_calendar_data_from_file (ECal *cal, gchar *filename, GError **error
 
   if (channel)
     g_io_channel_unref (channel);
-
-  return TRUE;
+  
+  if (num_comp_imported > 0)
+  {
+    return TRUE;
+  }
+  else 
+  {
+    *error = g_error_new_literal
+      (g_quark_from_string ("Dates"), 1, _("No calendar events found."));
+    return FALSE;
+  }
 }
 
 void