patch 9.1.1509: patch 9.1.1505 was not good

Problem:  Patch 9.1.1505 was not good
Solution: Revert "patch 9.1.1505: not possible to return completion type
          for :ex command" and instead add the getcompletiontype()
          function (Hirohito Higashi).

related: #17606
closes: #17662

Co-authored-by: Shougo Matsushita <Shougo.Matsu@gmail.com>
Signed-off-by: Hirohito Higashi <h.east.727@gmail.com>
Signed-off-by: Shougo Matsushita <Shougo.Matsu@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/evalfunc.c b/src/evalfunc.c
index 6ba698d..ec21087 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -2264,7 +2264,7 @@
 			ret_string,	    f_getcharstr},
     {"getcmdcomplpat",	0, 0, 0,	    NULL,
 			ret_string,	    f_getcmdcomplpat},
-    {"getcmdcompltype",	0, 1, FEARG_1,	    NULL,
+    {"getcmdcompltype",	0, 0, 0,	    NULL,
 			ret_string,	    f_getcmdcompltype},
     {"getcmdline",	0, 0, 0,	    NULL,
 			ret_string,	    f_getcmdline},
@@ -2280,6 +2280,8 @@
 			ret_string,	    f_getcmdwintype},
     {"getcompletion",	2, 3, FEARG_1,	    arg3_string_string_bool,
 			ret_list_string,    f_getcompletion},
+    {"getcompletiontype", 1, 1, FEARG_1,    arg1_string,
+			ret_string,	    f_getcompletiontype},
     {"getcurpos",	0, 1, FEARG_1,	    arg1_number,
 			ret_list_number,    f_getcurpos},
     {"getcursorcharpos", 0, 1, FEARG_1,	    arg1_number,