--- mng.c~	2004-08-19 21:37:03.643928172 +0200
+++ mng.c	2004-08-19 21:36:39.029430313 +0200
@@ -43,6 +43,8 @@
 	mng_uint32	delay;     /* ticks to wait before resuming decode */
 } mngstuff;
 
+void mng_window_setup(mngstuff *mymng, int x, int y, int width, int height);
+
 /* callbacks for the mng decoder */
 
 /* memory allocation; data must be zeroed */