"dcerpc_fragment_table" is used only in packet-smb-pipe.c, except for

"dcerpc_fragment_table" is used only in packet-smb-pipe.c, except for
the call to initialize it; move the call to initialize it to the
registration routine for the dissector that uses it, move the definition
of ""dcerpc_fragment_table" to packet-smb-pipe.c, make it static, and
remove the declaration of it from smb.h.

Add some casts to squelch compiler complaints.

git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@7449 f5534014-38df-0310-8fa8-9805f1628bb7