Get rid of gcc-4.1.1 warnings by initializing more fields.

* src/libraries/libcommon/misc-parser.c (parse_next_misc):
Initialize bcc_recipient, received_at and is_sent.  This gets rid
of a gcc-4.1.1 warning.
* src/libraries/libcommon/parser.c (parse): Always  initialize
answer.arguments and answer.indexes, to get rid of a gcc-4.1.1
warning.