patch 8.2.3996: Vim9: type checking lacks information about declared …

…type

Problem:    Vim9: type checking for list and dict lacks information about
            declared type.
Solution:   Add dv_decl_type and lv_decl_type.  Refactor the type stack to
            store two types in each entry.

src/dict.c

@@ -109,6 +109,8 @@ dict_free_contents(dict_T *d)
     hashtab_free_contents(&d->dv_hashtab);
     free_type(d->dv_type);
     d->dv_type = NULL;
+    free_type(d->dv_decl_type);
+    d->dv_decl_type = NULL;
 }
 
 /*
@@ -1354,8 +1356,7 @@ dict_filter_map(
 	    if (filtermap == FILTERMAP_MAP)
 	    {
 		if (argtype != NULL && check_typval_arg_type(
-			    argtype->tt_member, &newtv,
-			    func_name, 0) == FAIL)
+			     argtype->tt_member, &newtv, func_name, 0) == FAIL)
 		{
 		    clear_tv(&newtv);
 		    break;

src/evalbuffer.c

@@ -807,12 +807,6 @@ f_getbufline(typval_T *argvars, typval_T *rettv)
     get_buffer_lines(buf, lnum, end, TRUE, rettv);
 }
 
-    type_T *
-ret_f_getline(int argcount, type_T **argtypes UNUSED)
-{
-    return argcount == 1 ? &t_string : &t_list_string;
-}
-
 /*
  * "getline(lnum, [end])" function
  */