problem when applying a land sea mask with Load

Hi,

When I try this command line with the new load version, it seems there is a problem when applying the land sea mask, while it's working fine with the old version.

@nmanubens could you please have a look? list of potentially interested people: @vguemas @obellprat @vtorralba @nevensf @lpcaron @fmassonnet @eexarchou @mmenegoz ...

library(s2dverification, lib.loc = '/cfu/software/R/debian7.old/')
library(ncdf)
fnc=open.ncdf('/cfunas/exp/ecearth/land_sea_mask_320x160.nc')
maskexp=get.var.ncdf(fnc,'LSM')
close.ncdf(fnc)

Data <- Load("tas", c("b0cm"), obs="ERAint", sdates=c("19930501"),output="lonlat",leadtimemin=1,leadtimemax=1,maskmod=list(maskexp),lonmin=340, lonmax=40, latmin=30, latmax=70)
PlotEquiMap((Data$obs)[,,,,,], Data$lon, Data$lat,filled.continents=FALSE)