patch 8.1.0571: non-silent execute() resets display column to zero

Problem:    Non-silent execute() resets display column to zero.
Solution:   Keep the display column as-is.
diff --git a/src/version.c b/src/version.c
index 8df3ac7..049f34b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -793,6 +793,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    571,
+/**/
     570,
 /**/
     569,