gridarea: added support for CDI_PROJ_RLL.

src/Gridcell.c

@@ -45,7 +45,9 @@ void grid_cell_area(int gridID, double *array)
 
   if ( gridtype == GRID_LONLAT      ||
        gridtype == GRID_GAUSSIAN    ||
-       gridtype == GRID_LAEA || projtype == CDI_PROJ_LAEA ||
+       gridtype == GRID_LAEA        ||
+       projtype == CDI_PROJ_RLL     ||
+       projtype == CDI_PROJ_LAEA    ||
        gridtype == GRID_LCC         ||
        gridtype == GRID_GME         ||
        gridtype == GRID_CURVILINEAR ||

src/grid.c

@@ -1779,6 +1779,7 @@ int gridWeights(int gridID, double *grid_wgts)
 	   gridtype == GRID_LCC         ||
 	   gridtype == GRID_LCC2        ||
 	   gridtype == GRID_LAEA        ||
+	   projtype == CDI_PROJ_RLL     ||
 	   projtype == CDI_PROJ_LAEA    ||
 	   gridtype == GRID_SINUSOIDAL  ||
 	   gridtype == GRID_GME         ||

src/grid_area.c

@@ -299,6 +299,7 @@ int gridGenArea(int gridID, double* area)
        gridtype != GRID_LCC         &&
        gridtype != GRID_LCC2        &&
        gridtype != GRID_LAEA        &&
+       projtype != CDI_PROJ_RLL     &&
        projtype != CDI_PROJ_LAEA    &&
        gridtype != GRID_SINUSOIDAL  &&
        gridtype != GRID_GME         &&