Index: mng.c
--- mng.c.orig
+++ mng.c
@@ -45,6 +45,8 @@ typedef struct {
 
 void mng_window_setup __P((mngstuff *mymng, int x, int y, int width, int height));
 
+void mng_window_setup(mngstuff *, int, int, int, int);
+
 /* callbacks for the mng decoder */
 
 /* memory allocation; data must be zeroed */