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
diff --git a/src/version.c b/src/version.c
index c59a3a1..080c3ad 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1312,
+/**/
     1311,
 /**/
     1310,
diff --git a/src/window.c b/src/window.c
index 234d2a8..e903332 100644
--- a/src/window.c
+++ b/src/window.c
@@ -5328,7 +5328,10 @@
     if (*p_spk == 'c')		// assume cursor position needs updating
 	changed_line_abv_curs();
     else
-	win_fix_cursor(TRUE);
+	// Make sure the cursor position is valid, either by moving the cursor
+	// or by scrolling the text.
+	win_fix_cursor(
+		get_real_state() & (MODE_NORMAL|MODE_CMDLINE|MODE_TERMINAL));
 
     // Now it is OK to parse messages again, which may be needed in
     // autocommands.
@@ -6782,7 +6785,8 @@
 /*
  * Make sure the cursor position is valid for 'splitkeep'.
  * If it is not, put the cursor position in the jumplist and move it.
- * If we are not in normal mode, scroll to make valid instead.
+ * If we are not in normal mode ("normal" is zero), make it valid by scrolling
+ * instead.
  */
     static void
 win_fix_cursor(int normal)