Let relations cloner use a non-cloned From object.

In the case where the user only wants the relations and MC particles
cloned, and not the (proto)particles, the cloner should be allowed to
just take the (proto)particles from the 'original' location, and should
not force the user to have used the microDST cloners on them beforehand.

MicroDST/MicroDSTBase/MicroDST/RelationsClonerAlg.h

@@ -50,10 +50,12 @@ namespace MicroDST
       : MicroDSTAlgorithm ( name , pSvcLocator   ),
         m_cloner          ( NULL                 ),
         m_clonerType      ( DEFAULTS::clonerType ),
+        m_useOriginalFrom ( false                ),
         m_tableCloner( boost::bind(&RelationsClonerAlg<TABLE>::cloneFrom, &(*this), _1),
                        boost::bind(&RelationsClonerAlg<TABLE>::cloneTo,   &(*this), _1) )
     {
       declareProperty( "ClonerType", m_clonerType );
+      declareProperty( "UseOriginalFrom", m_useOriginalFrom, "Take 'from' object from original location");
       //setProperty( "OutputLevel", 1 );
     }
 
@@ -186,6 +188,10 @@ namespace MicroDST
 
     inline typename TABLE::From cloneFrom(const typename TABLE::From from)
     {
+      if ( m_useOriginalFrom )
+      {
+        return from;
+      }
       if ( ! from )
       {
         error() << "FROM is NULL !!!!" << endmsg;
@@ -219,6 +225,7 @@ namespace MicroDST
 
     CLONER* m_cloner;
     std::string m_clonerType;
+    bool m_useOriginalFrom;
     TableCloner m_tableCloner;
 
   };