patch 8.1.0918: MS-Windows: startup messages are not converted

Problem:    MS-Windows: startup messages are not converted.
Solution:   Convert messages when the current codepage differs from
            'encoding'. (Yasuhiro Matsumoto, closes #3914)
diff --git a/src/version.c b/src/version.c
index 9a31c2f..73840c2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -784,6 +784,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    918,
+/**/
     917,
 /**/
     916,