[vala] (7 commits) ...vala: Use some replacement for an unavailable identifier string

[Rico Tzschichholz <ricotz src gnome org>]

Summary of changes:

  5e5126b... codegen: Make *_try_id specific to emit-context instead bei (*)
  5464767... parser: Deal with certain missing delimiters and let the pa (*)
  ec37f4c... parser: Handle delimiters inside of parse_argument_list/par (*)
  2517adb... parser: Make parse_argument_list/parse_initializer more rob (*)
  a8c1bab... parser: Make parse_embedded_statement_without_block more ro (*)
  18578a1... parser: Make parse_identifier more robust (*)
  e2104cd... vala: Use some replacement for an unavailable identifier st (*)

(*) This commit already existed in another branch; no separate mail sent