Set default number of smoothing steps for linear solver to 1

The default solver fastAMG use only one smoothing step anyway

examples/upscale_relpermvisc.cpp

@@ -234,6 +234,7 @@ int main(int varnum, char** vararg)
     options.insert(make_pair("linsolver_verbosity", "0"));     // verbosity level for linear solver
     options.insert(make_pair("linsolver_type",      "3"));     // type of linear solver: 0 = ILU/BiCGStab, 1 = AMG/CG, 2 = KAMG/CG, 3 = FastAMG/CG
     options.insert(make_pair("linsolver_prolongate_factor", "1.0")); // Factor to scale the prolongate coarse grid correction,
+    options.insert(make_pair("linsolver_smooth_steps", "1")); // Number of pre and postsmoothing steps for AMG
 
     /* Check first if there is anything on the command line to look for */
     if (varnum == 1) {