Remove annoying error message

guichet.hcl.example

@@ -12,7 +12,7 @@ job "guichet" {
     task "server" {
       driver = "docker"
       config {
-        image = "lxpz/guichet_amd64:7"
+        image = "lxpz/guichet_amd64:8"
         readonly_rootfs = true
         port_map {
           web_port = 9991

invite.go

@@ -223,13 +223,11 @@ func handleInviteSendCode(w http.ResponseWriter, r *http.Request) {
 		r.ParseForm()
 
 		choice := strings.Join(r.Form["choice"], "")
-		if choice != "display" && choice != "send" {
-			http.Error(w, "Invalid entry", http.StatusBadRequest)
-			return
-		}
 		sendto := strings.Join(r.Form["sendto"], "")
 
-		trySendCode(login, choice, sendto, data)
+		if choice == "display" || choice == "send" {
+			trySendCode(login, choice, sendto, data)
+		}
 	}
 
 	templateInviteSendCode.Execute(w, data)