Free semaphore memory on Linux.

git-svn-id: http://subversion.jackaudio.org/jack/jack2/trunk/jackmp@4267 0c269be4-1314-0410-8aa9-9f06e86f4224

example-clients/midi_latency_test.c

@@ -172,6 +172,8 @@ destroy_semaphore(semaphore_t semaphore, int id)
         sprintf(name, "midi_sem_%d", id);
         sem_unlink(name);
     }
+#else
+    free(semaphore);
 #endif
 #endif