patch 8.2.0201: cannot assign to an imported variable

Problem:    Cannot assign to an imported variable.
Solution:   Make it work.
diff --git a/src/userfunc.c b/src/userfunc.c
index fd4d1ce..2904ee9 100644
--- a/src/userfunc.c
+++ b/src/userfunc.c
@@ -678,7 +678,7 @@
 	    return func;
 
 	// Find imported funcion before global one.
-	imported = find_imported(name, cctx);
+	imported = find_imported(name, 0, cctx);
 	if (imported != NULL && imported->imp_funcname != NULL)
 	{
 	    hi = hash_find(&func_hashtab, imported->imp_funcname);