[PATCH libnetfilter_queue] src: Simplify struct pkt_buff: remove head

[Duncan Roe <duncan_roe@optusnet.com.au>]

head and data always had the same value.
head was in the minority, so replace with data where it was used.

Signed-off-by: Duncan Roe <duncan_roe@optusnet.com.au>
---
 src/extra/pktbuff.c | 5 ++---
 src/internal.h      | 1 -
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/src/extra/pktbuff.c b/src/extra/pktbuff.c
index f013cfe..c95384f 100644
--- a/src/extra/pktbuff.c
+++ b/src/extra/pktbuff.c
@@ -66,9 +66,8 @@ struct pkt_buff *pktb_alloc(int family, void *data, size_t len, size_t extra)
 	pktb->len = len;
 	pktb->data_len = len + extra;
 
-	pktb->head = pkt_data;
 	pktb->data = pkt_data;
-	pktb->tail = pktb->head + len;
+	pktb->tail = pktb->data + len;
 
 	switch(family) {
 	case AF_INET:
@@ -204,7 +203,7 @@ EXPORT_SYMBOL
 void pktb_trim(struct pkt_buff *pktb, unsigned int len)
 {
 	pktb->len = len;
-	pktb->tail = pktb->head + len;
+	pktb->tail = pktb->data + len;
 }
 
 /**
diff --git a/src/internal.h b/src/internal.h
index d968325..0cfa425 100644
--- a/src/internal.h
+++ b/src/internal.h
@@ -23,7 +23,6 @@ struct pkt_buff {
 	uint8_t *network_header;
 	uint8_t *transport_header;
 
-	uint8_t *head;
 	uint8_t *data;
 	uint8_t *tail;
 
-- 
2.14.5