add 'consumed' argument to ast_get_time_t, so callers can know how many characters were used in the parser
update pbx_dundi to use ast_get_time_t
eliminate some compiler warnings


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@10871 65c4cc65-6c06-0410-ace0-fbb531ad65f3