HZ not always defined on all Linux systems.

git-svn-id: http://svn.fedorahosted.org/svn/corosync/trunk@1433 fd59a12c-fef9-0310-b244-a6a79926bd2f

exec/tlist.h

@@ -45,7 +45,7 @@
 
 #include "../include/list.h"
 
-#if defined(OPENAIS_BSD) || defined(OPENAIS_DARWIN)
+#ifndef HZ
 	#define HZ 100  /* 10ms */
 #endif