[API] changed BodyStatistics to use shared_ptr instead of reference

src/pe/statistics/BodyStatistics.cpp

@@ -42,7 +42,7 @@ void BodyStatistics::operator()()
    velocitySample_.clear();
    massSample_.clear();
 
-   for( auto blockIt = blockStorage_.begin(); blockIt != blockStorage_.end(); ++blockIt )
+   for( auto blockIt = blockStorage_->begin(); blockIt != blockStorage_->end(); ++blockIt )
    {
       auto storage = blockIt->getData< pe::Storage >( bodyStorageID_ );
       const pe::BodyStorage & localStorage  = (*storage)[0];

src/pe/statistics/BodyStatistics.h

@@ -36,7 +36,7 @@ class BodyStatistics
 {
 public:
 
-   BodyStatistics( const BlockStorage & blockStorage, const BlockDataID & bodyStorageID )
+   BodyStatistics( const shared_ptr<BlockStorage>& blockStorage, const BlockDataID & bodyStorageID )
       : blockStorage_( blockStorage ), bodyStorageID_( bodyStorageID )
    { }
 
@@ -52,8 +52,8 @@ public:
    real_t totalMass() const { return massSample_.sum(); }
 
 private:
-   const BlockStorage & blockStorage_;
-   BlockDataID bodyStorageID_;
+   const shared_ptr<BlockStorage> blockStorage_;
+   const BlockDataID              bodyStorageID_;
 
    math::Sample localBodiesBlockSample_, shadowBodiesBlockSample_;
    math::Sample localBodiesProcessSample_, shadowBodiesProcessSample_;