explicit braces to avoid ambiguous 'else'

[[Imported from SVN: r925]]

istl/paamg/hierarchy.hh

@@ -661,11 +661,13 @@ namespace Dune
             DUNE_THROW(NotImplemented, "Accumulation to fewer processes not yet implemented!");
           else{
             if(MINIMAL_DEBUG_LEVEL>=INFO_DEBUG_LEVEL && rank==0)
+            {
               if(noAggregates)
                 dinfo << "Stopped coarsening because of rate breakdown "<<unknowns/noAggregates<<"<"
                       <<criterion.minCoarsenRate()<<std::endl;
               else
                 dinfo << "Could not build any aggregates. Probably no connected nodes."<<std::endl;
+            }
             delete aggregatesMap;
             break;
           }