Fix issue with Aurora compilers

Grid/qcd/action/gauge/GaugeImplTypes.h

@@ -138,10 +138,13 @@ public:
     //auto start = std::chrono::high_resolution_clock::now();
     autoView(U_v,U,AcceleratorWrite);
     autoView(P_v,P,AcceleratorRead);
-    accelerator_for(ss, P.Grid()->oSites(),1,{
+    typedef typename Field::vector_object vobj;
+    const int Nsimd = vobj::Nsimd();
+    accelerator_for(ss, P.Grid()->oSites(),Nsimd,{
       for (int mu = 0; mu < Nd; mu++) {
-          U_v[ss](mu) = Exponentiate(P_v[ss](mu), ep, Nexp) * U_v[ss](mu);
+	auto tmp = Exponentiate(P_v(ss)(mu), ep, Nexp) * U_v(ss)(mu);
-          U_v[ss](mu) = Group::ProjectOnGeneralGroup(U_v[ss](mu));
+	tmp      = Group::ProjectOnGeneralGroup(tmp);
+	coalescedWrite(U_v[ss](mu),tmp);
       }
     });
    //auto end = std::chrono::high_resolution_clock::now();

Grid/qcd/smearing/JacobianAction.h

@@ -54,7 +54,7 @@ public:
   // Usual cases are not used
   //////////////////////////////////
   virtual void refresh(const GaugeField &U, GridSerialRNG &sRNG, GridParallelRNG &pRNG){ GRID_ASSERT(0);};
-  virtual RealD S(const GaugeField &U) { GRID_ASSERT(0); }
+  virtual RealD S(const GaugeField &U) { GRID_ASSERT(0); return 0; }
   virtual void deriv(const GaugeField &U, GaugeField &dSdU) { GRID_ASSERT(0);  }
 
   //////////////////////////////////