`isos.rheology_file` resolution bug?

[sperezmont]

I noticed that I managed to run an ANT-32KM simulation while using ANT-16KM_GIA_HR24.ncas a rheology file and I didn't get any error... This is myisos` block

&isos_south
 heterogeneous_ssh = .true.   
 interactive_sealevel = .true.
 include_elastic = .true.     
 correct_compression = .true. 
 correct_distortion = .false. 
 method          = 3          
 dt_prognostics  = 1.0        
 dt_diagnostics  = 10.0       
 pad             = 512.0      
 mantle          = 'rheology_file'
 lithosphere     = 'rheology_file'
 layering        = 'parallel' 
 lumping         = 'min'      
 viscosity_scaling_method = 'scale'
 viscosity_scaling = 1.0      
 nl              = 5          
 dl              = 25.0       
 zl              = 100 150 200 250 300
 viscosities     = 1e+21 1e+21 1e+21 1e+21 2e+21
 ref_viscosity   = 1e+21      
 tau             = 2000.0     
 rheo_smoothing_radius = 40.0 
 E               = 66.0       
 nu              = 0.28       
 rho_ice         = 910.0      
 rho_seawater    = 1028.0     
 rho_water       = 1000.0     
 rho_uppermantle = 3400.0     
 rho_litho       = 3200.0     
 g               = 9.81       
 r_earth         = 6378.0     
 m_earth         = 5.972e+24  
 restart         = 'None'     
 mask_file       = 'None'     
 rheology_file   = 'isostasy_data/earth_structure/yelmo/ANT-16KM_GIA_HR24.nc'
 litho_thickness_varname = 'litho_thickness'
 log10_viscosity_varname = 'log10_visc'
 stddev_log10_viscosity_varname = 'none'
/