From cf3e34f88cfeb0abf39d0a95199c7927913fee44 Mon Sep 17 00:00:00 2001
From: "Timur A. Fatkhullin" <timur@sao.ru>
Date: Tue, 14 Jan 2025 11:33:05 +0300
Subject: [PATCH] fix logging

---
 raptor_eagle_ccd.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/raptor_eagle_ccd.cpp b/raptor_eagle_ccd.cpp
index ca9d03f..c8a93f8 100644
--- a/raptor_eagle_ccd.cpp
+++ b/raptor_eagle_ccd.cpp
@@ -1326,11 +1326,13 @@ void RaptorEagleCCD::initAttrComm()
     addAttribute(
         CAMERA_ATTR_FITS_TEMPLATE,
         [this]() {
-            logTrace("Return current FITS-image header template filename as {}", _currentTemplateFile);
+            logTrace("Return current FITS-image header template filename as {}",
+                     _currentTemplateFile.size() ? _currentTemplateFile : "<empty string>");
             return _currentTemplateFile;
         },
         [this](const std::string& filename) {
-            logDebug("Set current FITS-image header template filename to {}", filename);
+            logDebug("Set current FITS-image header template filename to {}",
+                     filename.size() ? filename : "<empty string>");
 
             _currentTemplateFile = filename;
         });