Index: smbd/password.c
===================================================================
--- smbd/password.c	(revision 518)
+++ smbd/password.c	(working copy)
@@ -492,6 +492,8 @@
 
 		if ( session_userlist )
 			user_list = strdup(session_userlist);
+		else
+			user_list = strdup("");
 
 		if (!user_list)
 			return(False);