Reduce objhead size by overloading.

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@3770 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/hash_slinger.h

@@ -76,17 +76,12 @@ struct objhead {
 	VTAILQ_HEAD(,objcore)	objcs;
 	char			*hash;
 	unsigned char		digest[DIGEST_LEN];
-#ifndef NOT_YET
 	union {
 		VTAILQ_HEAD(, sess)	__u_waitinglist;
 		VTAILQ_ENTRY(objhead)	__u_coollist;
 	} __u;
 #define waitinglist __u.__u_waitinglist
 #define coollist __u.__u_coollist
-#else
-	VTAILQ_HEAD(, sess)	waitinglist;
-	VTAILQ_ENTRY(objhead)	coollist;
-#endif
 
 	/*----------------------------------------------------
 	 * The fields below are for the sole private use of