use QVector instead of QList for block cache

app/node/output/track/track.cpp

@@ -225,9 +225,9 @@ Block *TrackOutput::BlockAtTime(const rational &time) const
   return nullptr;
 }
 
-QList<Block *> TrackOutput::BlocksAtTimeRange(const TimeRange &range) const
+QVector<Block *> TrackOutput::BlocksAtTimeRange(const TimeRange &range) const
 {
-  QList<Block*> list;
+  QVector<Block*> list;
 
   if (IsMuted()) {
     return list;

app/node/output/track/track.h

@@ -148,9 +148,9 @@ public:
    * `block.in < range.out && block.out > range.in`. Returns an empty list if IsMuted() or if
    * `range.in >= track.length`. Blocks that are not enabled will be omitted from the returned list.
    */
-  QList<Block*> BlocksAtTimeRange(const TimeRange& range) const;
+  QVector<Block*> BlocksAtTimeRange(const TimeRange& range) const;
 
-  const QList<Block *> &Blocks() const
+  const QVector<Block *> &Blocks() const
   {
     return block_cache_;
   }
@@ -276,7 +276,7 @@ private:
 
   void SetLengthInternal(const rational& r, bool invalidate = true);
 
-  QList<Block*> block_cache_;
+  QVector<Block*> block_cache_;
 
   NodeInput* block_input_;