Update curl_interface.cpp
Update curl_interface.cpp
JosephP91/curlcpp,capturePointer/curlcpp,guker/curlcpp,gaomingyang21/curlcpp,ellivr/curlcpp,gaomingyang21/curlcpp,guker/curlcpp,ellivr/curlcpp,susnux/curlcpp,capturePointer/curlcpp,susnux/curlcpp,JosephP91/curlcpp