tests: new test to test insert task with codelet NULL and a callback

tests/Makefile.am

@@ -141,6 +141,7 @@ noinst_PROGRAMS =				\
 	main/starpu_init			\
 	main/starpu_worker_exists		\
 	main/submit				\
+	main/codelet_null_callback		\
 	datawizard/allocate			\
 	datawizard/acquire_cb			\
 	datawizard/acquire_cb_insert		\

tests/main/codelet_null_callback.c

@@ -0,0 +1,46 @@
+/* StarPU --- Runtime system for heterogeneous multicore architectures.
+ *
+ * Copyright (C) 2013  Centre National de la Recherche Scientifique
+ *
+ * StarPU is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or (at
+ * your option) any later version.
+ *
+ * StarPU is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * See the GNU Lesser General Public License in COPYING.LGPL for more details.
+ */
+
+#include <starpu.h>
+#include "../helper.h"
+
+void callback(void *ptr)
+{
+     int *x = (int *)ptr;
+     FPRINTF(stderr, "x=%d\n", *x);
+     STARPU_ASSERT(*x == 42);
+}
+
+int main(int argc, char **argv)
+{
+	int ret;
+	int x=42;
+
+	ret = starpu_initialize(NULL, &argc, &argv);
+	if (ret == -ENODEV) return STARPU_TEST_SKIPPED;
+	STARPU_CHECK_RETURN_VALUE(ret, "starpu_init");
+
+	ret = starpu_insert_task(NULL,
+				 STARPU_CALLBACK_WITH_ARG, callback, &x,
+				 0);
+	STARPU_CHECK_RETURN_VALUE(ret, "starpu_insert_task");
+
+	starpu_task_wait_for_all();
+	starpu_shutdown();
+
+	return EXIT_SUCCESS;
+}
+