patch 8.0.0059

Problem:    Vim does not build on VMS systems.
Solution:   Various changes for VMS. (Zoltan Arpadffy)

src/json.c

@@ -16,6 +16,10 @@
 
 #include "vim.h"
 
+#ifdef VAX
+# undef FEAT_FLOAT // VAX does not handle well the Infinities
+#endif
+
 #if defined(FEAT_EVAL) || defined(PROTO)
 
 static int json_encode_item(garray_T *gap, typval_T *val, int copyID, int options);