patch 9.0.2153: no support to build on OpenVMS

Problem:  no support to build on OpenVMS
Solution: Add OpenVMS X86_64 platform port

closes: #13623

Co-authored-by: errael <errael@raelity.com>
Co-authored-by: K.Takata <kentkt@csc.jp>
Signed-off-by: Zoltan Arpadffy <zoltan.arpadffy@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/map.c b/src/map.c
index 98785e7..b7bb46c 100644
--- a/src/map.c
+++ b/src/map.c
@@ -3114,7 +3114,7 @@
 		    {
 			if (p[0] != ',')
 			{
-			    snprintf(args->os_errbuf, args->os_errbuflen,
+			    vim_snprintf(args->os_errbuf, args->os_errbuflen,
 				    _(e_langmap_extra_characters_after_semicolon_str),
 				    p);
 			    return args->os_errbuf;