fix the init struct

httplib/httplib.go

@@ -85,7 +85,7 @@ func newBeegoRequest(url, method string) *BeegoHttpRequest {
 		ProtoMajor: 1,
 		ProtoMinor: 1,
 	}
-	return &BeegoHttpRequest{url, &req, map[string]string{}, map[string]string{}, defaultSetting, &resp, nil}
+	return &BeegoHttpRequest{url, &req, map[string]string{}, map[string]string{}, defaultSetting, &resp, nil, nil}
 }
 
 // Get returns *BeegoHttpRequest with GET method.