add missing headers (compiled without GDAL)

    (merge https://trac.osgeo.org/grass/changeset/66590 from trunk)


git-svn-id: https://svn.osgeo.org/grass/grass/branches/releasebranch_7_0@66591 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/raster3d/test/test_put_get_value_large_file.c

@@ -16,6 +16,7 @@
 *****************************************************************************/
 #include <stdlib.h>
 #include <string.h>
+#include <math.h>
 #include "test_raster3d_lib.h"
 #include "grass/interpf.h"
 

raster/r.carve/enforce_ds.c

@@ -19,6 +19,7 @@
 
 #include <stdio.h>
 #include <string.h>
+#include <math.h>
 #include <grass/gis.h>
 #include <grass/raster.h>
 #include <grass/glocale.h>

vector/v.external.out/format.c

@@ -1,4 +1,5 @@
 #include <string.h>
+#include <stdlib.h>
 
 #include <grass/gis.h>
 #include <grass/glocale.h>