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,

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1312,
 /**/
     1311,
 /**/