patch 8.2.3874: cannot highlight the number column for a sign

Problem:    Cannot highlight the number column for a sign.
Solution:   Add the "numhl" argument. (James McCoy, closes #9381)
diff --git a/src/popupwin.c b/src/popupwin.c
index 266e113..7b74261 100644
--- a/src/popupwin.c
+++ b/src/popupwin.c
@@ -632,7 +632,7 @@
 
 	    if (syn_name2id((char_u *)linehl) == 0)
 		linehl = "PmenuSel";
-	    sign_define_by_name(sign_name, NULL, (char_u *)linehl, NULL, NULL, NULL);
+	    sign_define_by_name(sign_name, NULL, (char_u *)linehl, NULL, NULL, NULL, NULL);
 	}
 
 	sign_place(&sign_id, (char_u *)"PopUpMenu", sign_name,