updated for version 7.3.085

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

src/eval.c

@@ -10,9 +10,6 @@
 /*
  * eval.c: Expression evaluation.
  */
-#if defined(MSDOS) || defined(WIN16) || defined(WIN32) || defined(_WIN64)
-# include "vimio.h"	/* for mch_open(), must be before vim.h */
-#endif
 
 #include "vim.h"