Fix initial value

nel/include/nel/web/http_client_curl.h

@@ -34,7 +34,7 @@ class CCurlHttpClient
 public:
 
 	/// Constructor
-	CCurlHttpClient() {}
+	CCurlHttpClient() : _CurlStruct(NULL) {}
 
 	/// Connect to an http server (string by val is intended). If you specify a whole URL, an attempt will be made to determine the server.
 	bool connect(const std::string &server);

nel/src/web/http_client_curl.cpp

@@ -192,6 +192,7 @@ bool CCurlHttpClient::receive(string &res, bool verbose)
 void CCurlHttpClient::disconnect()
 {
 	curl_easy_cleanup(_Curl);
+	_Curl = NULL;
 	curl_global_cleanup();
 }