levels: int -> size_t

src/one-body-sample.cc

@@ -192,7 +192,7 @@ int main(int argc, char *argv[]) {
         parset.get<size_t>("solver.maxiterations");
     auto const solver_tolerance = parset.get<double>("solver.tolerance");
 
-    auto const levels = parset.get<int>("grid.refinements") + 1;
+    auto const levels = parset.get<size_t>("grid.refinements") + 1;
 
     auto const verbose = parset.get<bool>("verbose");
     Solver::VerbosityMode verbosity = verbose ? Solver::FULL : Solver::QUIET;