patch 8.0.1109: timer causes error on exit from Ex mode

Problem:    Timer causes error on exit from Ex mode. (xtal8)
Solution:   save and restore the ex_pressedreturn flag. (Christian Brabandt,
            closes #2079)
diff --git a/src/proto/ex_docmd.pro b/src/proto/ex_docmd.pro
index 1a931e5..116ff4e 100644
--- a/src/proto/ex_docmd.pro
+++ b/src/proto/ex_docmd.pro
@@ -63,4 +63,6 @@
 char_u *get_behave_arg(expand_T *xp, int idx);
 char_u *get_messages_arg(expand_T *xp, int idx);
 char_u *get_mapclear_arg(expand_T *xp, int idx);
+int get_pressedreturn(void);
+void set_pressedreturn(int val);
 /* vim: set ft=c : */