patch 9.0.1312: Cursor position wrong when splitting window in insert mode

Problem:    Cursor position wrong when splitting window in insert mode.
Solution:   Pass the actual mode to win_fix_cursor(). (Luuk van Baal,
            closes #11999,
diff --git a/src/testdir/test_window_cmd.vim b/src/testdir/test_window_cmd.vim
index 1441db5..969edff 100644
--- a/src/testdir/test_window_cmd.vim
+++ b/src/testdir/test_window_cmd.vim
@@ -1753,14 +1753,7 @@
 
     " Scroll when cursor becomes invalid in insert mode.
     norm Lic
-    call assert_equal(curpos[0], getcurpos()[0], 'run ' .. run)
-
-    " The line number might be one less because of round-off.
-    call assert_inrange(curpos[1] - 1, curpos[1], getcurpos()[1], 'run ' .. run)
-
-    call assert_equal(curpos[2], getcurpos()[2], 'run ' .. run)
-    call assert_equal(curpos[3], getcurpos()[3], 'run ' .. run)
-    call assert_equal(curpos[4], getcurpos()[4], 'run ' .. run)
+    call assert_equal(curpos, getcurpos(), 'run ' .. run)
 
     " No scroll when topline not equal to 1
     only | execute "norm gg5\<C-e>" | split | wincmd k