cmTakeSeqBldr.c : Added 'muid' to cmScTrkMidiTsb_t.

Fixed bug in _cmTsbScoreTrkFree().

app/cmTakeSeqBldr.c

 // Score track record: Map a score event to a MIDI event. 
 typedef struct cmScTrkMidiTsb_str
 {
-  unsigned mni;      // midi note index as an offset from the take marker
+  unsigned mni;      // MIDI note index as an offset from the take marker
+  unsigned muid;     // MIDI file msg  unique id
   unsigned scEvtIdx; // score event index this not is assoc'd with or -1 if it did not match
   unsigned flags;    // flags from cmScMatcherResult_t 
 } cmScTrkMidiTsb_t;
     goto errLabel;
   }
   
-  for(i=0; i<p->scTrkTakeN; ++i)
-    cmMemPtrFree(&p->scTrkTakeV[i].midiV);
+  if( p->scTrkTakeV != NULL )
+  {
+    for(i=0; i<p->scTrkTakeN; ++i)
+      cmMemPtrFree(&p->scTrkTakeV[i].midiV);
 
-  cmMemPtrFree(&p->scTrkTakeV);
+    cmMemPtrFree(&p->scTrkTakeV);
+  }
 
   if( cmTimeLineFinalize(&p->tlH) != kOkTlRC )
     rc = cmErrMsg(&p->err,kTimeLineFailTsbRC,"Time line object finalize failed.");
       // parse the note record
       if((jsRC = cmJsonMemberValues( noteObj, &errMsg,
             "mni",      kIntTId, &p->scTrkTakeV[i].midiV[j].mni,
+            "muid",     kIntTId, &p->scTrkTakeV[i].midiV[j].muid,
             "scEvtIdx", kIntTId, &p->scTrkTakeV[i].midiV[j].scEvtIdx,
             "flags",    kIntTId, &p->scTrkTakeV[i].midiV[j].flags,
             NULL)) != kOkJsRC )