patch 8.1.1596: when resizing the screen may draw popup in wrong position

Problem:    When resizing the screen may draw popup in wrong position. (Masato
            Nishihata)
Solution:   Check the popup is not outside of the screen. (fixes #4592)
diff --git a/src/version.c b/src/version.c
index 0631f09..fa4e50d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1596,
+/**/
     1595,
 /**/
     1594,