patch 8.2.4256: MS-Windows: compiler warnings when compiled with /W4

Problem:    MS-Windows: compiler warnings when compiled with /W4.
Solution:   Small adjustments to the code. (Ken Takata, closes #9659)
diff --git a/src/version.c b/src/version.c
index 3e4072d..c76a475 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4256,
+/**/
     4255,
 /**/
     4254,