The prototype and implementation of 'zmtp1_print_datagram()' is slightly
different; the prototype has a 'const u_int len' as the last parameter.
Whereas the implementation has no 'const'. Hence I get a warning from
MSVC.
extern void mpls_lsp_ping_print(const u_char *, u_int);
extern void zephyr_print(const u_char *, int);
extern void zmtp1_print(const u_char *, u_int);
extern void mpls_lsp_ping_print(const u_char *, u_int);
extern void zephyr_print(const u_char *, int);
extern void zmtp1_print(const u_char *, u_int);
-extern void zmtp1_print_datagram(const u_char *, u_int);
+extern void zmtp1_print_datagram(const u_char *, const u_int);
extern void bfd_print(const u_char *, u_int, u_int);
extern void sip_print(const u_char *, u_int);
extern void syslog_print(const u_char *, u_int);
extern void bfd_print(const u_char *, u_int, u_int);
extern void sip_print(const u_char *, u_int);
extern void syslog_print(const u_char *, u_int);