Issue #1025286 by Tor Arne Thune, Devin Carlson, swentel: Fixed logo_upload in...

Issue #1025286 by Tor Arne Thune, Devin Carlson, swentel: Fixed logo_upload in form_set_error() instead of favicon_upload in system.admin.inc.

core/modules/system/system.admin.inc

@@ -616,7 +616,7 @@ function system_theme_settings_validate($form, &$form_state) {
     }
     else {
       // File upload failed.
-      form_set_error('logo_upload', t('The favicon could not be uploaded.'));
+      form_set_error('favicon_upload', t('The favicon could not be uploaded.'));
     }
   }