Fix. reset `lcurl_easy_t::multi` pointer when `info_read` function remove easy handle.
Fix. reset `lcurl_easy_t::multi` pointer when `info_read` function remove easy handle.

moteus/lua-lcurl,moteus/lua-lcurl,Lua-cURL/Lua-cURLv3,Lua-cURL/Lua-cURLv3,Lua-cURL/Lua-cURLv3