1.1 --- a/src/goat3d.h	Mon Aug 26 06:08:40 2013 +0300
     1.2 +++ b/src/goat3d.h	Tue Sep 10 15:29:45 2013 +0300
     1.3 @@ -10,7 +10,7 @@
     1.4  	void *cls;	/* closure data */
     1.5  
     1.6  	long (*read)(void *buf, size_t bytes, void *uptr);
     1.7 -	long (*write)(void *buf, size_t bytes, void *uptr);
     1.8 +	long (*write)(const void *buf, size_t bytes, void *uptr);
     1.9  	long (*seek)(long offs, int whence, void *uptr);
    1.10  };
    1.11