Fixed centermass functon to move the vertices so cm is always 0

Samo Penic

2012-07-09 919555150e5676cae7f7c471e4bdf30d563bcb12

 src/frame.c

@@ -16,6 +16,13 @@
    vesicle->cm[0]/=(ts_float)n;
    vesicle->cm[1]/=(ts_float)n;
    vesicle->cm[2]/=(ts_float)n;

    for(i=0;i<n;i++){
        vtx[i]->x-=vesicle->cm[0];
        vtx[i]->y-=vesicle->cm[1];
        vtx[i]->z-=vesicle->cm[2]; 
    } 

    return TS_SUCCESS;
}