All the filters using windows have been modified so they use the window specifications (start, end) instead of a vector of pointers. The FilterWindAvg was not properly handling nodata, this has been fixed. By the way, when using a reasonnably large buffer size, the new filter window management is actually slightly faster than the old one (1%). 

The handling of "soft" is now different: soft ONLY applies to the window specifications. Before, a soft filter would leave values that could not get a window untouched while non-soft would force them to nodata. Now, all values that can not get a window are left unchanged, while the window centering can change according to "soft".