[AGENT++] IPv6 bug on Windows platform

[Marcus Frenkel]

Hi

I tried to compile SNMP++v3.2.25 with IPv6 enabled, but there is a
problem in the following place:
notifyqueue.cpp, line 487

Basically, the function "if (inet_pton(AF_INET6,
addrstr.get_printable() ..." calls inet_pton which is not specific to
Windows. For now I just enclosed the function in #ifndef WIN32 as an
ugly workaround on Windows platform.

Marcus