Update iij version to remove CRLF (#635)

Gopkg.lock

@@ -223,14 +223,14 @@
 
 [[projects]]
   branch = "master"
-  digest = "1:fed64c975620bacb8b3e531e31974149eef07fa0c4bc99185d35c4beaa6bd98a"
+  digest = "1:c45e4f1755487478216e06437e161d56299d963282ce109555091bc4c7a57343"
   name = "github.com/iij/doapi"
   packages = [
     ".",
     "protocol",
   ]
   pruneopts = "NUT"
-  revision = "afe9fa11fb27e5e8ab2dfc1675e91387aa63eaa2"
+  revision = "8803795a9b7b938fa88ddbd63a77893beee14cd8"
 
 [[projects]]
   digest = "1:ac6d01547ec4f7f673311b4663909269bfb8249952de3279799289467837c3cc"

vendor/github.com/iij/doapi/api.go

@@ -140,6 +140,9 @@ func (a API) PostSome(method string, param url.URL, body interface{}) (resp *htt
 	if body != nil {
 		var bufb []byte
 		bufb, err = json.Marshal(body)
+		if err != nil {
+			return nil, err
+		}
 		if len(bufb) > 2 {
 			log.Debug("call with body", method, string(bufb))
 			buf = bytes.NewBuffer(bufb)
@@ -154,6 +157,9 @@ func (a API) PostSome(method string, param url.URL, body interface{}) (resp *htt
 		buf = bytes.NewBufferString("")
 	}
 	req, err := http.NewRequest(method, param.String(), buf)
+	if err != nil {
+		return nil, err
+	}
 	if body != nil {
 		req.Header.Add("content-type", PostContentType)
 	}