LArRecUtils: Don't complain in LArADC2MeVCondAlg if low gain data are missing.

In one configuration, observed errors from LArADC2MeVCondAlg because
low gain data were missing.  With LArADC2MeVTool, this would not be
an error.  Update LArADC2MeVCondAlg so that this is not an error.


Former-commit-id: ff75d1a2

LArCalorimeter/LArRecUtils/src/LArADC2MeVCondAlg.cxx

@@ -14,6 +14,7 @@
 #include "LArElecCalib/ILArHVScaleCorr.h"
 #include "LArIdentifier/LArOnlineID.h"
 #include "LArIdentifier/LArOnline_SuperCellID.h"
+#include "CaloIdentifier/CaloGain.h"
 
 #include "LArElecCalib/ILArFEBConfigReader.h"
 
@@ -271,8 +272,14 @@ StatusCode LArADC2MeVCondAlg::execute() {
 	// ADC2DAC is a vector (polynomial fit of ramps)
 	const ILArRamp::RampRef_t adc2dac = larRamp->ADC2DAC(chid,igain);
 	if (adc2dac.size()<2) {
-	  msg(MSG::ERROR) << "No Ramp found for channel " << larOnlineID->channel_name(chid) << ", gain " << igain << endmsg;
-	  ++nNoRamp;
+          // Low gain can sometimes be missing: not an error.
+          if (igain == CaloGain::LARLOWGAIN) {
+            msg(MSG::VERBOSE) << "No Ramp found for channel " << larOnlineID->channel_name(chid) << ", gain " << igain << endmsg;
+          }
+          else {
+            msg(MSG::ERROR) << "No Ramp found for channel " << larOnlineID->channel_name(chid) << ", gain " << igain << endmsg;
+            ++nNoRamp;
+          }
 	  continue;
 	}