patch 9.0.0571: MS-Windows: CTRL-C can make Vim exit

Problem:    MS-Windows: CTRL-C can make Vim exit.
Solution:   Check the not-a-term argument.
diff --git a/src/version.c b/src/version.c
index 1cbf551..ad6a9ed 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    571,
+/**/
     570,
 /**/
     569,