Fix typo

Ignore-this: 49564b09411ceed3999581df47a8517b

darcs-hash:20100617142446-56b4d-1cda67e81afb8ca7f585f86731d45cdd1c722277
Fixed ICE properties in SDP objects

Ignore-this: 2f8c0850530bee03aab8e4191361ad91

darcs-hash:20100618145953-56b4d-48cde818bbdae08f07ec6037b713a4b6b0c6aa2b