Made the successful creation statement conditional on the successful creation of the detector

Analysis/src/ZDC.cpp

@@ -80,8 +80,11 @@ void ZDC::LoadElements( std::vector < Channel* > _elements, int _runNumber){
             SetElement(_elements.at(i));
         }
     }
-    if(GetChannelsVector().size() > 1) std::cout << "WARNING : more than one entry for one ZDC module. Check the config.xml" << std::endl;
-    std::cout << "ZDC object created with " << GetChannelsVector().size() << " channel entries " << std::endl;
+    if(GetChannelsVector().size() > 1)
+      std::cout << "WARNING : more than one entry for one ZDC module. Check the config.xml" << std::endl;
+
+    if(GetChannelsVector().size() > 0)
+      std::cout << "ZDC object created with " << GetChannelsVector().size() << " channel entries " << std::endl;
 }