v.what.rast: precision fix for -i interpolate (trunk, https://trac.osgeo.org/grass/changeset/67261, see there for long comment)

git-svn-id: https://svn.osgeo.org/grass/grass/branches/releasebranch_7_0@67263 15284696-431f-4ddb-bdfa-cd5b030d7da7

vector/v.what.rast/main.c

@@ -327,13 +327,13 @@ int main(int argc, char *argv[])
 		if (interp_flag->answer) {
 		    if (cache[point].row <= 0)
 			Rast_set_null_value(prev_d_row, window.cols,
-					    out_type);
+					    DCELL_TYPE);
 		    else
 			Rast_get_d_row(fd, prev_d_row, cache[point].row - 1);
 
 		    if (cache[point].row + 1 > window.rows - 1)
 			Rast_set_null_value(next_d_row, window.cols,
-					    out_type);
+					    DCELL_TYPE);
 		    else
 			Rast_get_d_row(fd, next_d_row, cache[point].row + 1);
 		}