Clean up some header inclusions in the unit tests.

src/exp10.h

@@ -25,11 +25,11 @@
 /* Some standard headers. */
 #include <math.h>
 
+#ifndef __GNUC__
+
 /* Local headers. */
 #include "inline.h"
 
-#ifndef __GNUC__
-
 /**
  * @brief Raises 10 to the power of the argument.
  *

tests/testCosmology.c

@@ -18,7 +18,7 @@
  ******************************************************************************/
 
 /* Some standard headers. */
-#include <stdlib.h>
+#include "../config.h"
 
 /* Includes. */
 #include "swift.h"

tests/testOutputList.c

@@ -17,10 +17,9 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  ******************************************************************************/
+#include "../config.h"
 
-#include <math.h>
-#include <stdio.h>
-#include <string.h>
+/* Includes. */
 #include "swift.h"
 
 #define Ntest 3

tests/testSelectOutput.c

@@ -18,7 +18,7 @@
  ******************************************************************************/
 
 /* Some standard headers. */
-#include <stdlib.h>
+#include "../config.h"
 
 /* Includes. */
 #include "swift.h"