refcount_underflow.patch

diff --git a/DDG4/src/Geant4Particle.cpp b/DDG4/src/Geant4Particle.cpp
index 1db6105c..7f8d7482 100644
--- a/DDG4/src/Geant4Particle.cpp
+++ b/DDG4/src/Geant4Particle.cpp
@@ -57,7 +57,9 @@ Geant4Particle::~Geant4Particle()  {
 void Geant4Particle::release()  {
   //::printf("************ Release Geant4Particle[%p]: ID:%d pdgID %d ref:%d\n",(void*)this,id,pdgID,ref-1);
   if ( --ref <= 0 )  {
+    if( (ref > -1) ) { 
     delete this;
+    }
   }
 }