patch 9.0.2047: perl: warning about inconsistent dll linkage

Problem:  perl: warning about inconsistent dll linkage
Solution: suppress warning

Suppress warning C4273 (inconsistent DLL linkage).

Also adjust inconsistent use of const.

closes: #13369

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Ken Takata <kentkt@csc.jp>
diff --git a/src/version.c b/src/version.c
index 1dba3bd..f839c28 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2047,
+/**/
     2046,
 /**/
     2045,