get_truncation(::AbstractGrid)

[milankl]

Solves

julia> map = randn(FullGaussianGrid,24);

julia> SpectralTransform(map)
ERROR: MethodError: no method matching get_truncation(::FullGaussianGrid{Float64})

Closest candidates are:
  get_truncation(::Integer)
   @ SpeedyWeather ~/.julia/packages/SpeedyWeather/5646I/src/SpeedyTransforms/aliasing.jl:9
  get_truncation(::Integer, ::Real)
   @ SpeedyWeather ~/.julia/packages/SpeedyWeather/5646I/src/SpeedyTransforms/aliasing.jl:9

Stacktrace:
 [1] SpectralTransform(map::FullGaussianGrid{Float64}; recompute_legendre::Bool)
   @ SpeedyWeather.SpeedyTransforms ~/.julia/packages/SpeedyWeather/5646I/src/SpeedyTransforms/spectral_transform.jl:239
 [2] SpectralTransform(map::FullGaussianGrid{Float64})
   @ SpeedyWeather.SpeedyTransforms ~/.julia/packages/SpeedyWeather/5646I/src/SpeedyTransforms/spectral_transform.jl:234
 [3] top-level scope
   @ REPL[179]:1