increased sync threshold to get consistent shadow copies

apps/benchmarks/PeriodicGranularGas/PeriodicGranularGas.cpp

@@ -160,11 +160,11 @@ int main( int argc, char ** argv )
    std::function<void(void)> syncCallWithoutTT;
    if (bNN)
    {
-      syncCallWithoutTT = std::bind( pe::syncNextNeighbors<BodyTuple>, boost::ref(*forest), storageID, static_cast<WcTimingTree*>(NULL), real_c(0.0), false );
+      syncCallWithoutTT = std::bind( pe::syncNextNeighbors<BodyTuple>, boost::ref(*forest), storageID, static_cast<WcTimingTree*>(NULL), real_c(0.1), false );
       WALBERLA_LOG_INFO_ON_ROOT("Using NextNeighbor sync!");
    } else if (bSO)
    {
-      syncCallWithoutTT = std::bind( pe::syncShadowOwners<BodyTuple>, boost::ref(*forest), storageID, static_cast<WcTimingTree*>(NULL), real_c(0.0), false );
+      syncCallWithoutTT = std::bind( pe::syncShadowOwners<BodyTuple>, boost::ref(*forest), storageID, static_cast<WcTimingTree*>(NULL), real_c(0.1), false );
       WALBERLA_LOG_INFO_ON_ROOT("Using ShadowOwner sync!");
    } else
    {