Added check for remote transport in MSRPStreamBase

Ignore-this: 96f0d8eec73e1060c3181f77150799d4

darcs-hash:20091223120631-1e3d8-dddd931b0450e043c6eb5308b6cf3f8e1addcd70
Added check in MSRPStreamBase for transport mismatch in settings

Ignore-this: 6fd22d9f4dd934a15e99a58dd605583e

darcs-hash:20091223141053-1e3d8-52a4e5f4577e849a3dc61a7f21c90201f81eef21