Include <sys/types.h> properly.

Follow up on earlier commits (0c21cb2, 341acb8, f4840dc, 69f105d) and
try to fix the last remaining issue.

In pcap/bpf.h do not try to duplicate the contents of pcap-types.h, it
was a bad idea of mine because in a public header HAVE_SYS_TYPES_H is
out of place.  Instead of that in pcap/bpf.h trust the including file
to have unsiged integer types defined (usually by means of including
either pcap/pcap.h or pcap-types.h).  Include pcap-types.h not from
gencode.c, but from gencode.h, so the latter can include pcap/bpf.h and
itself can be included early.  Add a comment.

1 files changed, 8 insertions, 0 deletions

diff --git a/gencode.h b/gencode.h
index 9631dd02..93ca5216 100644
--- a/gencode.h
+++ b/gencode.h
@@ -23,6 +23,14 @@
 #define gencode_h
 
 #include "pcap/funcattrs.h"
+/*
+ * pcap/bpf.h (a public header) needs u_char, u_short and u_int, which can be
+ * made available via either pcap-types.h (a private header) or pcap/pcap.h
+ * (a public header), none of which pcap/bpf.h includes.  Include the private
+ * header to keep things simple, this way this private header should compile
+ * even if included early from another file.
+ */
+#include "pcap-types.h"
 #include "pcap/bpf.h" /* bpf_u_int32 and BPF_MEMWORDS */
 
 /*