Fix compilation failures when building wireshark-0.99.6-SVN-21916 on an
x86_64-unknown-linux-gnu target with gcc version 4.1.2 20070403 (Red Hat
4.1.2-8).
The failures fall into two categories:
(1) Casts between pointers and 32-bit integers without an intermediary cast
via 'long' or 'unsigned long'. This results in a compiler warning
complaining about casts between a pointer and an integer of a different
size.
(2) Passing values to "%lld" or similar printf-style format options that the
compiler thinks are a different size. Such values need to be cast to
'long long' or 'unsigned long long'.
