make changes suggested by andrew that remove warning messages

src/ca/caChannel.cpp

@@ -422,13 +422,10 @@ void CAChannel::disconnectChannel()
              << " channelCreated " << (channelCreated ? "true" : "false")
              << endl;
     }
-    bool disconnect = true;
     {
         Lock lock(requestsMutex);
-        if(!channelCreated) disconnect = false;
-        channelCreated = false;
+        if(!channelCreated) return;
     }
-    if(!disconnect) return;
     /* Clear CA Channel */
     threadAttach();
     ca_clear_channel(channelID);

src/ca/caProvider.cpp

@@ -190,9 +190,7 @@ void ca_factory_cleanup(void*)
         ChannelProviderRegistry::clients()->remove("ca");
         ca_context_destroy(); 
     } catch(std::exception& e) {
-        std::string message("Error when unregister \"ca\" factory");
-        message += e.what();
-        LOG(logLevelWarn,message.c_str());
+        LOG(logLevelWarn, "Error on unregistering \"ca\" factory: %s", e.what());
     }
 }