patch 8.1.1590: popup window test fails

Problem:    Popup window test fails.
Solution:   Add "scrollbar" to expected result.
diff --git a/src/testdir/test_popupwin.vim b/src/testdir/test_popupwin.vim
index 1e8f522..b6cef00 100644
--- a/src/testdir/test_popupwin.vim
+++ b/src/testdir/test_popupwin.vim
@@ -134,6 +134,7 @@
 	\ 'core_width': 12,
 	\ 'height': 3,
 	\ 'core_height': 1,
+	\ 'scrollbar': 0,
 	\ 'visible': 1}
   let winid = popup_create('hello border', {'line': 2, 'col': 3, 'border': []})",
   call assert_equal(with_border_or_padding, popup_getpos(winid))
@@ -170,6 +171,7 @@
 	\ 'width': 14,
 	\ 'core_width': 10,
 	\ 'height': 5,
+	\ 'scrollbar': 0,
 	\ 'core_height': 1,
 	\ 'visible': 1}, popup_getpos(winid))
 
diff --git a/src/version.c b/src/version.c
index 34af0de..5db753c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1590,
+/**/
     1589,
 /**/
     1588,