output: fixed registration for metforcing=False

src/getm/register_all_variables.F90

@@ -237,7 +237,7 @@
 !BOC
    LEVEL2 'register_meteo_variables()'
 
-   if (met_method .eq. 2) then
+   if (metforcing) then
       if (calc_met) then
          call fm%register('airp', 'Pa', 'air pressure', standard_name='', data2d=airp(_2D_W_), category="meteo/in", output_level=output_level_debug)
          call fm%register('t2', 'Celcius', '2m air temperature', standard_name='', data2d=t2(_2D_W_), category="meteo/in", output_level=output_level_debug)

src/meteo/meteo.F90

@@ -158,6 +158,7 @@
                LEVEL3 'ty     = ',ty
                LEVEL3 'swr    = ',swr_const
                LEVEL3 'shf    = ',shf_const
+               calc_met = .false.
             case (2)
                if(on_grid) then
                   LEVEL2 'Meteorological fields are on the computational grid'