MatCalibration: add fallback solution for missing conditions

Det/FTDet/src/Lib/DeFTMat.cpp

@@ -76,6 +76,8 @@ StatusCode DeFTMat::initialize() {
   } else {
     msg << MSG::DEBUG << "Unable to find FT mat contraction conditions for " << getMatName( aChan )
         << ". It will not be possible to correct for temperature distortions." << endmsg;
+    m_matContractionParameterVector =
+        std::vector<double>( m_nChannelsInSiPM * m_nSiPMsInMat, 0.0 ); // fallback solution to remove later warnings
     m_matContractionParameterVector.shrink_to_fit();
   }