patch 8.2.4799: popup does not use correct topline

Problem:    Popup does not use correct topline.
Solution:   Also add one when firstline is negative. (closes #10229)
diff --git a/src/version.c b/src/version.c
index 83d8e1b..447bbd8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4799,
+/**/
     4798,
 /**/
     4797,