Fix memory leak in live inputs

lib/dtsc.h

@@ -282,6 +282,7 @@ namespace DTSC {
       Track();      
       Track(JSON::Value & trackRef);
       Track(Scan & trackRef);
+      void clearParts();
             
       inline operator bool() const {
         return (parts.size() && keySizes.size() && (keySizes.size() == keys.size()));

lib/dtscmeta.cpp

@@ -1297,6 +1297,10 @@ namespace DTSC {
     fragments.rbegin()->setSize(fragments.rbegin()->getSize() + packDataSize);
   }
 
+  void Track::clearParts(){
+    while (fragments.size() > 1){removeFirstKey();}
+  }
+
   /// Removes the first buffered key, including any fragments it was part of
   void Track::removeFirstKey(){
     HIGH_MSG("Erasing key %d:%lu", trackID, keys[0].getNumber());

src/io.cpp

@@ -316,6 +316,9 @@ namespace Mist {
 
     if (myMeta.live){
       myMeta.update(pack);
+      for (std::map<unsigned int, DTSC::Track>::iterator it = myMeta.tracks.begin(); it != myMeta.tracks.end(); it++) {
+        it->second.clearParts();
+      }
     }
 
     //End of brain melt