Make struct storage fields used onlyr for SENDFILE_WORKS conditional.

Spotted by:	sky

bin/varnishd/cache.h

@@ -382,8 +382,10 @@ struct storage {
 	unsigned		len;
 	unsigned		space;
 
+#ifdef SENDFILE_WORKS
 	int			fd;
 	off_t			where;
+#endif
 };
 
 /* Object core structure ---------------------------------------------

bin/varnishd/storage_file.c

@@ -487,8 +487,10 @@ smf_alloc(struct stevedore *st, size_t size)
 	smf->s.ptr = smf->ptr;
 	smf->s.len = 0;
 	smf->s.stevedore = st;
+#ifdef SENDFILE_WORKS
 	smf->s.fd = smf->sc->fd;
 	smf->s.where = smf->offset;
+#endif
 	return (&smf->s);
 }
 

bin/varnishd/storage_malloc.c

@@ -95,7 +95,9 @@ sma_alloc(struct stevedore *st, size_t size)
 	}
 	sma->s.len = 0;
 	sma->s.space = size;
+#ifdef SENDFILE_WORKS
 	sma->s.fd = -1;
+#endif
 	sma->s.stevedore = st;
 	sma->s.magic = STORAGE_MAGIC;
 	return (&sma->s);

bin/varnishd/storage_persistent.c

@@ -450,7 +450,9 @@ smp_allocx(struct stevedore *st, size_t min_size, size_t max_size,
 	ss->space = max_size;
 	ss->priv = sc;
 	ss->stevedore = st;
+#ifdef SENDFILE_WORKS
 	ss->fd = sc->fd;
+#endif
 	if (ssg != NULL)
 		*ssg = sg;
 	return (ss);

bin/varnishd/storage_synth.c

@@ -91,7 +91,9 @@ SMS_Makesynth(struct object *obj)
 	sto->priv = vsb;
 	sto->len = 0;
 	sto->space = 0;
+#ifdef SENDFILE_WORKS
 	sto->fd = -1;
+#endif
 	sto->stevedore = &sms_stevedore;
 	sto->magic = STORAGE_MAGIC;