Revert "do not clone geometry"

This reverts commit fe94f36.

StRoot/Sti/StiMasterDetectorBuilder.cxx

@@ -25,6 +25,7 @@ void StiMasterDetectorBuilder::build(StMaker&source)
 {
   if (! gGeoManager) StiVMCToolKit::GetVMC();
 
+  TGeoManager *gGeoManagerSV = gGeoManager; gGeoManager = 0;
   StMaker *chain=StMaker::GetChain();
 
   LOG_INFO << "We are StiMasterDetectorBuilder::build() and will clone the geometry if exists" << endm;
@@ -34,6 +35,12 @@ void StiMasterDetectorBuilder::build(StMaker&source)
   }
 
 #if 1
+  if ( gGeoManagerSV ){
+    LOG_INFO << "Create a clone of VmcGeometry for reconstruction" << endm;
+    gGeoManagerSV->Clone("CloneGeom");
+  } else {
+    LOG_INFO << "Could not get a pointer to gGeoManager " << endm;
+  }
 #else
   if ( chain ) {
     LOG_INFO << "StiMasterDetectorBuilder::build() : Create clone of VmcGeometry by reinitialization for reconstruction" <<endm;
@@ -77,6 +84,9 @@ void StiMasterDetectorBuilder::build(StMaker&source)
 	  row++;
 	}
     }
+  if (gGeoManagerSV) {
+    gGeoManager = gGeoManagerSV;
+  }
   cout << "StiMasterDetectorBuilder::build() -I- Done"<<endl;
 }