Fixes in a0 calculation and calculation of stretching energy in vertexmove

Samo Penic

2018-05-21 699ac44864e75549fb3d238d36f0bc1dd645ddac

 src/vertexmove.c

@@ -115,7 +115,7 @@
    }
   //stretching energy 1 of 3
   if(vesicle->tape->stretchswitch==1){
      for(i=0;i<vtx->tristar_no;i++) dstretchenergy-=vtx->tristar[i]->energy/3.0;
      for(i=0;i<vtx->tristar_no;i++) dstretchenergy-=vtx->tristar[i]->energy;
   }
    delta_energy=0;
    
@@ -199,7 +199,7 @@
   if(vesicle->tape->stretchswitch==1){
      for(i=0;i<vtx->tristar_no;i++){ 
         stretchenergy(vesicle, vtx->tristar[i]);
         dstretchenergy+=vtx->tristar[i]->energy/3.0;
         dstretchenergy+=vtx->tristar[i]->energy;
         }
   }