Index: trunk/FACT++/src/feedback.cc
===================================================================
--- trunk/FACT++/src/feedback.cc	(revision 16412)
+++ trunk/FACT++/src/feedback.cc	(revision 16413)
@@ -727,5 +727,5 @@
     void HandleCalibrateCurrents(const EventImp &evt)
     {
-        if (fBiasVolt.size()==0 || fCalibration.size()==0 || evt.GetSize()<416*sizeof(int16_t))
+        if (fBiasVolt.empty() || fCalibration.empty() || evt.GetSize()<416*sizeof(int16_t))
             return;
 
@@ -875,5 +875,5 @@
     int PrintCalibration()
     {
-        if (fCalibration.size()==0)
+        if (fCalibration.empty())
         {
             Out() << "No calibration performed so far." << endl;
@@ -1043,5 +1043,5 @@
             return kSM_FatalError;
 
-        if (fCalibration.size()==0)
+        if (fCalibration.empty())
         {
             Warn("Current control needs a bias crate calibration first... command ignored.");
@@ -1130,5 +1130,5 @@
         }
 
-        if (fVoltGapd.size()==0)
+        if (fVoltGapd.empty())
         {
             Error("No G-APD reference voltages received yet (BIAS_CONTROL/NOMINAL).");