[GRASS5] [bug #250] (grass) r.surf.contour: supports currently CELL type only

[Markus Neteler via RT]

r.surf.contour: supports currently CELL type only - should we add
a test for FP with a warning/error when the user calculates from
a FP map?

Markus

PS: e.g.

if( G_raster_map_is_fp(covermap->answer, mapset) != 0 )
    G_fatal_error("This module currently only supports integer (CELL) maps");


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