patch 9.0.0320: command line type of CmdlineChange differs from getcmdtype()

Problem:    Command line type of CmdlineChange differs from getcmdtype().
Solution:   Use the same type. (closes #11005)
diff --git a/src/proto/ex_getln.pro b/src/proto/ex_getln.pro
index 2eb32ab..88f0175 100644
--- a/src/proto/ex_getln.pro
+++ b/src/proto/ex_getln.pro
@@ -34,10 +34,9 @@
 void f_getcmdline(typval_T *argvars, typval_T *rettv);
 void f_getcmdpos(typval_T *argvars, typval_T *rettv);
 void f_getcmdscreenpos(typval_T *argvars, typval_T *rettv);
-int set_cmdline_str(char_u *str, int pos);
+void f_getcmdtype(typval_T *argvars, typval_T *rettv);
 void f_setcmdline(typval_T *argvars, typval_T *rettv);
 void f_setcmdpos(typval_T *argvars, typval_T *rettv);
-void f_getcmdtype(typval_T *argvars, typval_T *rettv);
 int get_cmdline_firstc(void);
 int get_list_range(char_u **str, int *num1, int *num2);
 char *check_cedit(void);