Update state vector with qdd[ind_qu] rather than udd

MBsysC/mbs_common/mbs_module/mbs_dirdyn.c

@@ -391,16 +391,8 @@ void mbs_fct_dirdyn(double tsim, double y[], double dydt[], MbsData *s, MbsAux *
     // Update state vector
     for(i=1;i<=s->nqu;i++)
     {
-        dydt[i-1] = s->qd[s->qu[i]];
-
-        if (opts->accelred)
-        {
-            dydt[i+s->nqu-1] = s->qdd[i];
-        }
-        else
-        {
-            dydt[i+s->nqu-1] = s->udd[i];
-        }
+        dydt[i-1]        = s->qd [s->qu[i]];
+        dydt[i+s->nqu-1] = s->qdd[s->qu[i]];
     }
     for(i=1;i<=s->Nux;i++)
     {