updated for version 7.3.085

Problem:    Inconsistency with preproc symbols.  void * computation.
Solution:   Include vimio.h from vim.h.  Add type cast.

src/memline.c

@@ -42,10 +42,6 @@
  *  mf_get().
  */
 
-#if defined(MSDOS) || defined(WIN16) || defined(WIN32) || defined(_WIN64)
-# include "vimio.h"	/* for mch_open(), must be before vim.h */
-#endif
-
 #include "vim.h"
 
 #ifndef UNIX		/* it's in os_unix.h for Unix */