* contrib/lisp/ob-oz.el (mozart): Don't throw an error

* contrib/lisp/ob-oz.el (mozart): Don't throw an error if the
mozart library is not present in the load-path.

contrib/lisp/ob-oz.el

@@ -90,7 +90,7 @@
 
 (require 'ob)
 ;;; major mode for editing Oz programs
-(require 'mozart)
+(require 'mozart nil t)
 
 ;;
 ;; Interface to communicate with Oz.