#include <stdlib.h> instead of the non-standard <malloc.h>.

diff --git a/dlls/winmm/tests/wave.c b/dlls/winmm/tests/wave.c
index 6138385..2012d98 100644
--- a/dlls/winmm/tests/wave.c
+++ b/dlls/winmm/tests/wave.c
@@ -18,7 +18,7 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
-#include <malloc.h>
+#include <stdlib.h>
 #include <math.h>
 
 #include "wine/test.h"