Changes to get fuzzer working in NetHackW.

include/extern.h

@@ -174,6 +174,7 @@ E boolean NDECL(status_hilite_menu);
 /* ### cmd.c ### */
 
 E char NDECL(randomkey);
+E void FDECL(random_response, (char * buf, int size));
 E int NDECL(doconduct);
 E int NDECL(domonability);
 E char FDECL(cmd_from_func, (int NDECL((*))));