patch 8.2.1028: Vim9: no error for declaring buffer, window, etc. variable
Problem: Vim9: no error for declaring buffer, window, etc. variable.
Solution: Give an error. Unify the error messages.
diff --git a/src/proto/vim9compile.pro b/src/proto/vim9compile.pro
index 0db5fc7..040e4d7 100644
--- a/src/proto/vim9compile.pro
+++ b/src/proto/vim9compile.pro
@@ -10,6 +10,7 @@
imported_T *find_imported(char_u *name, size_t len, cctx_T *cctx);
char_u *to_name_const_end(char_u *arg);
int assignment_len(char_u *p, int *heredoc);
+void vim9_declare_error(char_u *name);
int check_vim9_unlet(char_u *name);
int compile_def_function(ufunc_T *ufunc, int set_return_type, cctx_T *outer_cctx);
void set_function_type(ufunc_T *ufunc);