patch 9.0.1665: empty CmdlineEnter autocommand causes errors in Ex mode

Problem:    Empty CmdlineEnter autocommand causes errors in Ex mode.
Solution:   Save and restore ex_pressedreturn. (Christian Brabandt,
            closes # 12581, closes #12578)
diff --git a/src/version.c b/src/version.c
index 894b47d..9c451ae 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1665,
+/**/
     1664,
 /**/
     1663,