Set CHECK_OVERLAPS flag to 'true' & added CHECK_OVERLAPS flag to placement...

Set CHECK_OVERLAPS flag to 'true' & added CHECK_OVERLAPS flag to placement commands of all three sensitive detectors.

src/DetectorConstruction.cc

@@ -341,7 +341,8 @@ void DetectorConstruction::PlaceGeometry(){
 				"PMT",
 				m_logicWorld,
 				false,
-				0);
+				0,
+				CHECK_OVERLAPS) );
 
 
   //----------------- Place Intermediate Detector 1 -----------------//
@@ -353,7 +354,8 @@ void DetectorConstruction::PlaceGeometry(){
 				              "IntSD1",
 				              m_logicWorld,
 				              false,
-				              0) );
+				              0,
+					      CHECK_OVERLAPS) );
   //----------------- Place Intermediate Detector 2 -----------------//
 
   m_physIntSD.push_back(
@@ -363,7 +365,8 @@ void DetectorConstruction::PlaceGeometry(){
                                               "IntSD2",
                                               m_logicWorld,
                                               false,
-                                              0) );
+                                              0,
+					      CHECK_OVERLAPS) );
 
 
   //----------------- Define Optical Borders -----------------//