Meson field and Aslash field on GPU; some compiler warning removed

benchmarks/Benchmark_usqcd.cc

@@ -118,7 +118,7 @@ public:
     fprintf(FP,"Packet bytes, direction, GB/s per node\n");
     for(int lat=16;lat<=maxlat;lat+=8){
       //      for(int Ls=8;Ls<=8;Ls*=2){
-      { int Ls=12;
+      { int Ls=8;
 
 	Coordinate latt_size  ({lat*mpi_layout[0],
 	      lat*mpi_layout[1],
@@ -872,7 +872,7 @@ int main (int argc, char ** argv)
   int do_dslash=1;
 
   int sel=4;
-  std::vector<int> L_list({8,12,16,24,32});
+  std::vector<int> L_list({8,12,16,24});
   int selm1=sel-1;
 
   std::vector<double> clover;