#361514 by Dave Reid and drewish: Use file name in file error messages.

includes/file.inc

@@ -869,12 +869,12 @@ function file_save_upload($source, $validators = array(), $destination = FALSE,
   switch ($_FILES['files']['error'][$source]) {
     case UPLOAD_ERR_INI_SIZE:
     case UPLOAD_ERR_FORM_SIZE:
-      drupal_set_message(t('The file %file could not be saved, because it exceeds %maxsize, the maximum allowed size for uploads.', array('%file' => $source, '%maxsize' => format_size(file_upload_max_size()))), 'error');
+      drupal_set_message(t('The file %file could not be saved, because it exceeds %maxsize, the maximum allowed size for uploads.', array('%file' => $_FILES['files']['name'][$source], '%maxsize' => format_size(file_upload_max_size()))), 'error');
       return FALSE;
 
     case UPLOAD_ERR_PARTIAL:
     case UPLOAD_ERR_NO_FILE:
-      drupal_set_message(t('The file %file could not be saved, because the upload did not complete.', array('%file' => $source)), 'error');
+      drupal_set_message(t('The file %file could not be saved, because the upload did not complete.', array('%file' => $_FILES['files']['name'][$source])), 'error');
       return FALSE;
 
     case UPLOAD_ERR_OK:
@@ -886,7 +886,7 @@ function file_save_upload($source, $validators = array(), $destination = FALSE,
 
     // Unknown error
     default:
-      drupal_set_message(t('The file %file could not be saved. An unknown error has occurred.', array('%file' => $source)), 'error');
+      drupal_set_message(t('The file %file could not be saved. An unknown error has occurred.', array('%file' => $_FILES['files']['name'][$source])), 'error');
       return FALSE;
   }