Sort includes.

Signed-off-by: Bård Skaflestad <Bard.Skaflestad@sintef.no>

facetopology.c

@@ -32,12 +32,12 @@
   along with OpenRS.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#include <stdlib.h>
-#include <math.h>
-#include <string.h>
 #include <assert.h>
-#include <stdio.h>
 #include <limits.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 
 #include "preprocess.h"
 #include "facetopology.h"