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.

src/version.c

@@ -699,6 +699,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    571,
 /**/
     570,
 /**/