From 9596f2e9ee66d8f11c599d1465d92a6695c69bd3 Mon Sep 17 00:00:00 2001
From: Alex Orlenko <zxteam@protonmail.com>
Date: Sat, 3 Jun 2023 14:24:34 +0100
Subject: [PATCH] Fix warning when compiling for lua51

---
 src/function.rs | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/function.rs b/src/function.rs
index df6b952..84353d6 100644
--- a/src/function.rs
+++ b/src/function.rs
@@ -1,5 +1,4 @@
 use std::cell::RefCell;
-use std::ffi::CStr;
 use std::mem;
 use std::os::raw::{c_int, c_void};
 use std::ptr;
@@ -325,7 +324,7 @@ impl<'lua> Function<'lua> {
                 // Traverse upvalues until we find the _ENV one
                 match ffi::lua_getupvalue(state, -1, i) {
                     s if s.is_null() => break,
-                    s if CStr::from_ptr(s as _).to_bytes() == b"_ENV" => break,
+                    s if std::ffi::CStr::from_ptr(s as _).to_bytes() == b"_ENV" => break,
                     _ => ffi::lua_pop(state, 1),
                 }
             }
@@ -374,7 +373,7 @@ impl<'lua> Function<'lua> {
             for i in 1..=255 {
                 match ffi::lua_getupvalue(state, -1, i) {
                     s if s.is_null() => return Ok(false),
-                    s if CStr::from_ptr(s as _).to_bytes() == b"_ENV" => {
+                    s if std::ffi::CStr::from_ptr(s as _).to_bytes() == b"_ENV" => {
                         ffi::lua_pop(state, 1);
                         // Create an anonymous function with the new environment
                         let f_with_env = lua