Bugfixes for ref_ratio = 4 in the moving window direction. (#2452)

* Bugfixes for ref_ratio = 4 in the moving window direction.

* == should be <=

* only adjust guard cells for moving window by ref_ratio if nlevs > 1

* restore logic to always have at least 2 grow cells if moving window is on

* remove comment about this not being needed on level 0 - it does.

1 files changed, 2 insertions, 1 deletions

diff --git a/Source/Parallelization/GuardCellManager.H b/Source/Parallelization/GuardCellManager.H
index 0567a4162..34ac4eba8 100644
--- a/Source/Parallelization/GuardCellManager.H
+++ b/Source/Parallelization/GuardCellManager.H
@@ -55,7 +55,8 @@ public:
         const bool safe_guard_cells,
         const int do_electrostatic,
         const int do_multi_J,
-        const bool fft_do_time_averaging);
+        const bool fft_do_time_averaging,
+        const amrex::Vector<amrex::IntVect>& ref_ratios);
 
     // Guard cells allocated for MultiFabs E and B
     amrex::IntVect ng_alloc_EB = amrex::IntVect::TheZeroVector();