Add missing return value in pair_snap_kokkos

src/KOKKOS/pair_snap_kokkos_impl.h

@@ -282,6 +282,8 @@ double PairSNAPKokkos<DeviceType>::init_one(int i, int j)
   double cutone = PairSNAP::init_one(i,j);
   k_cutsq.h_view(i,j) = k_cutsq.h_view(j,i) = cutone*cutone;
   k_cutsq.template modify<LMPHostType>();
+  
+  return cutone;
 }
 
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