WIP: new ptm sequence delegate

src/grouping/ptm/ptmsamplescan.h

@@ -44,7 +44,7 @@ typedef std::shared_ptr<PtmSampleScan> PtmSampleScanSp;
 class PtmSampleScan
 {
 public:
-    PtmSampleScan(const PeptideMatch * p_peptide_match=nullptr);
+    PtmSampleScan(const PeptideMatch * p_peptide_match);
     PtmSampleScan(const PtmSampleScan& other);
     ~PtmSampleScan();