Indicate that we're including pcap/bpf.h not only to get bpf_u_int32
defined, but to get BPF_MEMWORDS defined, so that people (like me!) know
that you can't remove the need to include pcap/bpf.h just by using
uint32_t rather than bpf_u_int32.
#define gencode_h
#include "pcap/funcattrs.h"
#define gencode_h
#include "pcap/funcattrs.h"
-#include "pcap/bpf.h" /* bpf_u_int32 */
+#include "pcap/bpf.h" /* bpf_u_int32 and BPF_MEMWORDS */