mgmt: fix bad NFD_LOG_INFO statement in ManagerBase

refs: #1351

Change-Id: Id37451358840191310dd3c28b74b09faf5eb5731
diff --git a/daemon/mgmt/manager-base.cpp b/daemon/mgmt/manager-base.cpp
index bd94b18..ad26e53 100644
--- a/daemon/mgmt/manager-base.cpp
+++ b/daemon/mgmt/manager-base.cpp
@@ -52,7 +52,7 @@
 ManagerBase::onCommandValidationFailed(const shared_ptr<const Interest>& command,
                                        const std::string& error)
 {
-  NFD_LOG_INFO("command result: unauthorized verb: " << command);
+  NFD_LOG_INFO("command result: unauthorized command: " << *command);
   sendResponse(command->getName(), 403, "Unauthorized command");
 }