patch 8.1.2047: cannot check the current state

Problem:    Cannot check the current state.
Solution:   Add the state() function.
diff --git a/src/proto/misc1.pro b/src/proto/misc1.pro
index 08eb853..8de1aff 100644
--- a/src/proto/misc1.pro
+++ b/src/proto/misc1.pro
@@ -24,6 +24,8 @@
 void check_status(buf_T *buf);
 int ask_yesno(char_u *str, int direct);
 int is_mouse_key(int c);
+void f_mode(typval_T *argvars, typval_T *rettv);
+void f_state(typval_T *argvars, typval_T *rettv);
 int get_keystroke(void);
 int get_number(int colon, int *mouse_used);
 int prompt_for_number(int *mouse_used);