Index: filefield.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/filefield/filefield.module,v
retrieving revision 1.145
diff -u -r1.145 filefield.module
--- filefield.module	16 Aug 2008 20:08:34 -0000	1.145
+++ filefield.module	24 Aug 2008 19:45:08 -0000
@@ -662,6 +662,6 @@
 }
 
 
-function filefield_validate_is_image_help($size) {
+function filefield_validate_is_image_help($size = NULL) {
   return t('Must be an  JPEG, PNG or GIF image');
 }