patch 8.1.0947: using MSWIN before it is defined

Problem:    Using MSWIN before it is defined. (Cesar Romani)
Solution:   Move the block that uses MSWIN to below including vim.h. (Ken
            Takata)
diff --git a/src/version.c b/src/version.c
index ad062ae..269c01b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -780,6 +780,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    947,
+/**/
     946,
 /**/
     945,