struct pcap: Update buffer type from "void *" to "u_char *"

This change should avoid these cppcheck warnings:
pcap-hurd.c:77:18: warning: 'p->buffer' is of type 'void *'. When using
void pointers in calculations, the behaviour is undefined.
[arithOperationsOnVoidPointer]
 pkt = p->buffer + offsetof(struct net_rcv_msg, packet)
                 ^
pcap-hurd.c:78:8: warning: 'p->buffer+offsetof(struct net_rcv_msg,packet)'
is of type 'void *'. When using void pointers in calculations, the
behaviour is undefined. [arithOperationsOnVoidPointer]
       + sizeof(struct packet_header) - ETH_HLEN;
       ^
pcap-hurd.c:79:25: warning: 'p->buffer' is of type 'void *'. When using
void pointers in calculations, the behaviour is undefined.
[arithOperationsOnVoidPointer]
 memmove(pkt, p->buffer + offsetof(struct net_rcv_msg, header),
                        ^

Remove some '(u_char *)' casts accordingly.

1 files changed, 1 insertions, 1 deletions

diff --git a/pcap-bt-monitor-linux.c b/pcap-bt-monitor-linux.c
index 206e65b5..3d4f0b08 100644
--- a/pcap-bt-monitor-linux.c
+++ b/pcap-bt-monitor-linux.c
@@ -102,7 +102,7 @@ bt_monitor_read(pcap_t *handle, int max_packets _U_, pcap_handler callback, u_ch
     u_char *pktd;
     struct hci_mon_hdr hdr;
 
-    pktd = (u_char *)handle->buffer + BT_CONTROL_SIZE;
+    pktd = handle->buffer + BT_CONTROL_SIZE;
     bthdr = (pcap_bluetooth_linux_monitor_header*)(void *)pktd;
 
     iv[0].iov_base = &hdr;