patch 8.0.1573: getwinpos(1) may cause response to be handled as command

Problem:    getwinpos(1) may cause response to be handled as command.
Solution:   Handle any cursor position report once one was request. (partly by
            Hirohito Higashi)
diff --git a/src/version.c b/src/version.c
index f1a3b95..8fd5ea7 100644
--- a/src/version.c
+++ b/src/version.c
@@ -767,6 +767,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1573,
+/**/
     1572,
 /**/
     1571,