[AGENT++] can not compile agent++ in Debian linux

[Jochen Katz]

Hi,

> My snmp++ is V3.2.5.b and agent++ is V3.5. I know that the version is old.
> But it was together with one old program. So I just kept these two old
> pakages.

you will possibly get problems (ASN1 parse errors) on x64 with this old
code. Please see the current CHANGES file.

> mib.cpp
> ../include/mib.h:484: error: ISO C++ forbids declaration of 'MibTable' with
> no type

Obviously the "friend class MibTable;" is not enough: Add a "class
MibTable" in front of the MibLeaf class definition.

Regards,
  Jochen