Fix compilation warnings

Calorimeter/CaloDigiAlgs/src/CaloWaveformDigiAlg.cxx

@@ -114,7 +114,8 @@ CaloWaveformDigiAlg::execute(const EventContext& ctx) const {
     // Waveform was empty, fill with baseline
     int channel = m_mappingTool->getChannelMapping(w.first);
     ATH_MSG_DEBUG("Writing baseline into empty waveform in channel "<< channel);
-    for (const auto& tk : m_timekernel) {
+    int i = m_digiTool->nsamples();
+    while(i--) {  // Use while to avoid unused variable warning with for
       int baseline = m_digiTool->generate_baseline(m_base_mean, m_base_rms);
       waveforms[w.first].push_back(baseline);
     }

Scintillator/ScintDigiAlgs/src/ScintWaveformDigiAlg.cxx

@@ -147,7 +147,8 @@ ScintWaveformDigiAlg::execute(const EventContext& ctx) const {
     // Waveform was empty, fill with baseline
     int channel = m_mappingTool->getChannelMapping(w.first);
     ATH_MSG_DEBUG("Writing baseline into empty waveform in channel "<< channel);
-    for (const auto& tk : m_timekernel) {
+    int i = m_digiTool->nsamples();
+    while(i--) {  // Use while to avoid unused variable warning with for
       int baseline = m_digiTool->generate_baseline(m_base_mean, m_base_rms);
       waveforms[w.first].push_back(baseline);
     }