patch 8.2.2540: Vim9: no error for using script var name for argument
Problem: Vim9: no error for using script var name for argument.
Solution: Check for this error. (closes #7868)
diff --git a/src/proto/vim9compile.pro b/src/proto/vim9compile.pro
index 04c3c5e..410910f 100644
--- a/src/proto/vim9compile.pro
+++ b/src/proto/vim9compile.pro
@@ -1,4 +1,5 @@
/* vim9compile.c */
+int script_var_exists(char_u *name, size_t len, int vim9script, cctx_T *cctx);
int check_defined(char_u *p, size_t len, cctx_T *cctx);
int check_compare_types(exprtype_T type, typval_T *tv1, typval_T *tv2);
int use_typecheck(type_T *actual, type_T *expected);