patch 9.0.0638: popup menu highlight wrong on top of preview popup

Problem:    Popup menu highlight wrong on top of preview popup. (Yegappan
            Lakshmanan)
Solution:   Also check for the popup menu in screen_line().
diff --git a/src/version.c b/src/version.c
index 7c8be05..dd80828 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    638,
+/**/
     637,
 /**/
     636,